--- product_id: 1749653 title: "American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed" brand: "american weigh scales" price: "S$46" currency: SGD in_stock: true reviews_count: 13 category: "American Weigh Scales" url: https://www.desertcart.sg/products/1749653-american-weigh-scales-class-m2-14-piece-small-calibration-weigh store_origin: SG region: Singapore --- # Durable carbon steel, chrome finish ±0.016% accuracy 14-piece calibration set American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed **Brand:** american weigh scales **Price:** S$46 **Availability:** ✅ In Stock ## Summary > ⚖️ Calibrate like a pro, weigh with confidence! ## Quick Answers - **What is this?** American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed by american weigh scales - **How much does it cost?** S$46 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/1749653-american-weigh-scales-class-m2-14-piece-small-calibration-weigh) ## Best For - american weigh scales enthusiasts ## Why This Product - Trusted american weigh scales brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust & Stylish:** Carbon steel construction with a sleek chrome finish combines durability with professional aesthetics. - • **Ergonomic Handling:** Tapered tops on weights provide effortless grip and precise placement. - • **Precision You Can Trust:** Class M2 accuracy within ±0.016% ensures reliable scale calibration every time. - • **Complete Calibration Kit:** 14-piece set covers a wide range of weights from milligrams to grams for versatile use. - • **Ideal for Professionals & Hobbyists:** Perfect for lab, commercial, educational, and home scale calibration needs—stay ahead with confidence. ## Overview The American Weigh Scales Class M2 14-Piece Calibration Weigh Kit offers a reliable, economical solution for testing and calibrating digital scales. Featuring carbon steel weights with a chrome finish and tapered tops for easy handling, this kit delivers ±0.016% accuracy suitable for general laboratory, commercial, and educational use. Its comprehensive 14-piece range supports precise calibration from milligrams to grams, making it an essential tool for professionals and meticulous hobbyists alike. ## Description desertcart.com: American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed : Industrial & Scientific Review: Great, for the price. Actual weights of my sample listed here - This set of weights exceeded my expectations for accuracy given the price point. I will be the first to say that the case on this absolutely sucks. The holders for the round weights aren't terrible, but the spots for the square weights below 1g really need to have a better cover. The stock cover for the holders doesn't cover the entire opening. As such, the smaller weights (especially the ones below 100mg) are prone to escaping from their compartment and flying around the case. The bottom part of the case is made from two plastic pieces glued together, but there is a gap between them. When I first put this set of weights away, I didn't know about this problem. When I opened the box the next time, the 1mg weight was mysteriously gone, and some of the other weights were scattered around the inside of the box. Low and behold, the 1mg weight found its way into the very bottom of the box, between the two glued plastic pieces. The only way I was able to retrieve the weight is via the assistance of a strong rare earth magnet (prying the box apart would have worked as well). I suspect this is why some other reviewers are losing their smaller weights. To avoid this happening again in the future, I designed a 3D printed cover that protrudes slightly into each compartment. The OpenSCAD code is at the end of this review. My piece printed slightly tight, so I would recommend scaling down by a few percent if you print this yourself. I'm also not entirely sure if it's necessary to run the cover down into each compartment - a flat cover might be perfectly acceptable. Now for the part of the review I'm sure most came here to see... the actual weight of each of these weights. To weigh these, I used my Mettler Toledo AE 260 scale. It is an older model, over 20 years old at this point, but it's still accurate and precise. There is a built-in 100g calibration weight, but I was worried it might have lost some mass due to corrosion over the years. I ended up buying a 10g ASTM Class 1 calibration weight, and my scale measured this as between 9.9999 and 10.0000grams after calibrating to the internal 100g weight. Essentially: the weights I have measured here are precise to 0.1mg, with the caveat that they are potentially up to 0.1mg less than the true weight, according to an ASTM Class 1 calibrated weight. The theoretical weight, and my measured weights are as follows: 50g: 50.0095 g 20 - 19.9976 g 20 - 20.0016 g 10 - 10.0052 g 5 - 5.0014 g 2 - 1.9983 g 2 - 2.0011 g 1 - 1.0015 g 500mg - 499.9 mg 200 - 200.0 mg 100 - 100.5 mg 50 - 50.0 mg 20 - 20.0 mg 10 - 10.0 mg 1 - 1.1 mg As you can see, the actual weights are relatively close to the listed weights. They're not perfect, and off by quite a bit when compared to many international standards. That being said, these weights are not meant for high accuracy lab work - they are meant for a home user. Although I'm sure there are some, I'm not presently aware of any home applications where a 10mg error at 50g is a deal-breaker (honestly, this is even perfectly fine for a lot of general lab applications). As long as potential buyers of this weight should are aware of the intended user base, I think this a great set. I personally just use this to verify my scale is reading in the right ballpark across its entire range, and for that it's great. Of course I would prefer a full set of ASTM I calibrated weights with a nice case, but I don't want to spent $500-$1000 on a set of weights. For anyone reading this review, please note that the weights listed above are for my specific set of weights only. I can almost guarantee your set will be different. What you're paying for when you buy an $80 ASTM calibrated weight is the guarantee that it will definitely be within 0.xxx mg of the specified weight. With this cheap set, all you are guaranteed is that the weight will be within a few percent of the specified weight. Some will be nearly perfect, but many will be off considerably. OpenSCAD code for replacement lid: module indentations(){ cube([14.5, 20.5, 5]); translate([16.25, 0, 0]) cube([13.5, 20.5, 5]); translate([31.5, 0, 0]) cube([13.5, 20.5, 5]); translate([46.75, 0, 0]) cube([12.5, 20.5, 5]); translate([61, 10.5, 0]) cube([7.75, 10, 5]); translate([70, 10.5, 0]) cube([7, 10, 5]); translate([79, 10.5, 0]) cube([5.75, 10, 5]); translate([86, 10.5, 0]) cube([5.75, 10, 5]); translate([93.5, 10.5, 0]) cube([5.8, 10, 5]); translate([61, 0, 0]) cube([14.5, 8.75, 5]); translate([77.5, 0, 0]) cube([10.1, 8.75, 5]); translate([89.5, 0, 0]) cube([10, 8.75, 5]); } translate([0,1,0]) indentations(); translate([0,0,1]) cube([99.5,23.5,5]); translate([25,5,3]) cube([8,12,10]); translate([67,5,3]) cube([8,12,10]); Review: American Weigh Calibration Weight Kit, Class M2 - Today the American Weigh Calibration Weight Kit, Class M2 arrived in the mail. I measured various GRAMS to determine how accurate was my RCBS 5-0-5 scale is. To say I am amazed is an understatement. Before you use it for reloading, I would suggest going online and finding a "Grams to Grains" conversion calculator. I'm not sure if this will post, but I used: [...]. The kit comes with 2-20 gram weights. On the conversion website I entered the 20 grams and the equivalent number is 308.65 grains. I measured 308 grains on my RCBS scale and then placed the weight on the scale - it was near perfect. Remember the equivalent is 308.65 and NOT just 308. So to make a long story short it was PERFECTLY ON. I then removed the first 20 gram weight and placed the second 20 gram weight on the scale to test the weights for consistency. It was dead on the same amount WITH NOT EVEN A SMIDGEN OF VARIATION. I then did it with all the other weights as the 50 gram is tool large to measure with this scale, but every weight was not close, BUT PERFECT!!! For a precision reloader this is a great way to keep your scale accountable. :-) When I weigh a load, I want my cartridges to be as perfect and consistent as possible. Also because of the inherent danger of loading too much powder in casing is dangerous to both the firearm and myself, this little inexpensive tool gives me the peace of mind to know that I am right on because my scale is extremely accurate. Every reloader should own one. For only 12 bucks, you get a great resource that keeps you safe and consistent. Sure the plastic tweezers are not the best for placing the 20 grams on the scale, but if you are delicate and careful when picking the larger weights up, it is possible as I didn't drop a weight once. For all you exactitude people out there, THIS IS A MUST HAVE! ## Features - Our economical class M2 calibration weights are designed for testing and calibrating digital scales. Class M2 weights have an accuracy of ±0.016% making them suitable for general use. - If you require a certificate, check out our selection of Troemner calibration weights. - Carbon Steel with Chrome Finish - Tapered top for easy handling - OIML Class: M2 - Certificate Not Supplied, Suitable for general laboratory, commercial, and educational use ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003STEJAC | | Best Sellers Rank | #172,555 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #55 in Calibration Weights | | Brand | AMERICAN WEIGH SCALES | | Brand Name | AMERICAN WEIGH SCALES | | Color | Red | | Customer Reviews | 4.4 out of 5 stars 912 Reviews | | Display Type | digital | | Form Factor | Handheld | | Global Trade Identification Number | 00814859011274 | | Item Type Name | reg | | Item Weight | 9.07 g | | Manufacturer | AMERICAN WEIGH SCALES | | Material Type | Metal | | Measurement Type | pounds, grams, milligrams | | Model | WGHTKIT | | Part Number | WGHTKIT | | Readout Accuracy | ±0.016% | | Recommended Uses For Product | Packages | | Special Feature | Tapered top for easy handling | | Special Features | Tapered top for easy handling | | UPC | 074748346911 814859011274 798837614889 078433202254 735343565830 790683740651 | | Unit Count | 1 Count | | Weigh Scale Type | Counter Scale | | Weight Capacity Maximum | 8 pounds | | Weight Limit | 8 pounds | ## Product Details - **Brand:** AMERICAN WEIGH SCALES - **Color:** Red - **Display Type:** digital - **Recommended Uses For Product:** Packages - **Special Feature:** Tapered top for easy handling ## Images ![American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed - Image 1](https://m.media-amazon.com/images/I/61LCq03FVcL.jpg) ![American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed - Image 2](https://m.media-amazon.com/images/I/41evHWdVwTL.jpg) ![American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed - Image 3](https://m.media-amazon.com/images/I/31LoWj8oZqL.jpg) ![American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed - Image 4](https://m.media-amazon.com/images/I/41HVYn7DQwL.jpg) ![American Weigh Scales Class M2 14-Piece Small Calibration Weigh Kit Carbon Steel with Chrome FinishRed - Image 5](https://m.media-amazon.com/images/I/41fXBwG00+L.jpg) ## Questions & Answers **Q: Does this Calibration Kits come with the certificate？** A: Hold onto your socks! Amazon.com does offer a REAL set: https://www.amazon.com/Rice-Lake-Stainless-Calibration-Weight/dp/B006MWG13U/ref=sr_1_2?keywords=CERTIFIED%2Bcalibration%2Bweights&qid=1552671682&s=industrial&sr=1-2&th=1 **Q: How far off are these weights gauranteed to be off?** A: American Weigh's first bullet cites the accuracy standards for these weights: "• Class: OIML Class M2". For a table of allowable deviations see this page: http://www.npl.co.uk/reference/faqs/what-is-oiml-recommendation-r-111-(faq-mass-and-density) . **Q: There are 15 weights shown, 14 described. Which is correct?** A: There are 15 weights as I received. There are 2-2 g weights in the set. There is one 2-g weight not listed in the text as described. **Q: The ad sez "Set 2" ... is there a "Set 1", "Set 3", etc. and, if so, what are the pros and cons?** A: Each set is different. Just click on the set and it will give you details of each set. Each set is priced separetly. You should purchase the set that includes the correct weights for your needs. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great, for the price. Actual weights of my sample listed here *by G***K on March 26, 2016* This set of weights exceeded my expectations for accuracy given the price point. I will be the first to say that the case on this absolutely sucks. The holders for the round weights aren't terrible, but the spots for the square weights below 1g really need to have a better cover. The stock cover for the holders doesn't cover the entire opening. As such, the smaller weights (especially the ones below 100mg) are prone to escaping from their compartment and flying around the case. The bottom part of the case is made from two plastic pieces glued together, but there is a gap between them. When I first put this set of weights away, I didn't know about this problem. When I opened the box the next time, the 1mg weight was mysteriously gone, and some of the other weights were scattered around the inside of the box. Low and behold, the 1mg weight found its way into the very bottom of the box, between the two glued plastic pieces. The only way I was able to retrieve the weight is via the assistance of a strong rare earth magnet (prying the box apart would have worked as well). I suspect this is why some other reviewers are losing their smaller weights. To avoid this happening again in the future, I designed a 3D printed cover that protrudes slightly into each compartment. The OpenSCAD code is at the end of this review. My piece printed slightly tight, so I would recommend scaling down by a few percent if you print this yourself. I'm also not entirely sure if it's necessary to run the cover down into each compartment - a flat cover might be perfectly acceptable. Now for the part of the review I'm sure most came here to see... the actual weight of each of these weights. To weigh these, I used my Mettler Toledo AE 260 scale. It is an older model, over 20 years old at this point, but it's still accurate and precise. There is a built-in 100g calibration weight, but I was worried it might have lost some mass due to corrosion over the years. I ended up buying a 10g ASTM Class 1 calibration weight, and my scale measured this as between 9.9999 and 10.0000grams after calibrating to the internal 100g weight. Essentially: the weights I have measured here are precise to 0.1mg, with the caveat that they are potentially up to 0.1mg less than the true weight, according to an ASTM Class 1 calibrated weight. The theoretical weight, and my measured weights are as follows: 50g: 50.0095 g 20 - 19.9976 g 20 - 20.0016 g 10 - 10.0052 g 5 - 5.0014 g 2 - 1.9983 g 2 - 2.0011 g 1 - 1.0015 g 500mg - 499.9 mg 200 - 200.0 mg 100 - 100.5 mg 50 - 50.0 mg 20 - 20.0 mg 10 - 10.0 mg 1 - 1.1 mg As you can see, the actual weights are relatively close to the listed weights. They're not perfect, and off by quite a bit when compared to many international standards. That being said, these weights are not meant for high accuracy lab work - they are meant for a home user. Although I'm sure there are some, I'm not presently aware of any home applications where a 10mg error at 50g is a deal-breaker (honestly, this is even perfectly fine for a lot of general lab applications). As long as potential buyers of this weight should are aware of the intended user base, I think this a great set. I personally just use this to verify my scale is reading in the right ballpark across its entire range, and for that it's great. Of course I would prefer a full set of ASTM I calibrated weights with a nice case, but I don't want to spent $500-$1000 on a set of weights. For anyone reading this review, please note that the weights listed above are for my specific set of weights only. I can almost guarantee your set will be different. What you're paying for when you buy an $80 ASTM calibrated weight is the guarantee that it will definitely be within 0.xxx mg of the specified weight. With this cheap set, all you are guaranteed is that the weight will be within a few percent of the specified weight. Some will be nearly perfect, but many will be off considerably. OpenSCAD code for replacement lid: module indentations(){ cube([14.5, 20.5, 5]); translate([16.25, 0, 0]) cube([13.5, 20.5, 5]); translate([31.5, 0, 0]) cube([13.5, 20.5, 5]); translate([46.75, 0, 0]) cube([12.5, 20.5, 5]); translate([61, 10.5, 0]) cube([7.75, 10, 5]); translate([70, 10.5, 0]) cube([7, 10, 5]); translate([79, 10.5, 0]) cube([5.75, 10, 5]); translate([86, 10.5, 0]) cube([5.75, 10, 5]); translate([93.5, 10.5, 0]) cube([5.8, 10, 5]); translate([61, 0, 0]) cube([14.5, 8.75, 5]); translate([77.5, 0, 0]) cube([10.1, 8.75, 5]); translate([89.5, 0, 0]) cube([10, 8.75, 5]); } translate([0,1,0]) indentations(); translate([0,0,1]) cube([99.5,23.5,5]); translate([25,5,3]) cube([8,12,10]); translate([67,5,3]) cube([8,12,10]); ### ⭐⭐⭐⭐⭐ American Weigh Calibration Weight Kit, Class M2 *by S***E on December 22, 2012* Today the American Weigh Calibration Weight Kit, Class M2 arrived in the mail. I measured various GRAMS to determine how accurate was my RCBS 5-0-5 scale is. To say I am amazed is an understatement. Before you use it for reloading, I would suggest going online and finding a "Grams to Grains" conversion calculator. I'm not sure if this will post, but I used: [...]. The kit comes with 2-20 gram weights. On the conversion website I entered the 20 grams and the equivalent number is 308.65 grains. I measured 308 grains on my RCBS scale and then placed the weight on the scale - it was near perfect. Remember the equivalent is 308.65 and NOT just 308. So to make a long story short it was PERFECTLY ON. I then removed the first 20 gram weight and placed the second 20 gram weight on the scale to test the weights for consistency. It was dead on the same amount WITH NOT EVEN A SMIDGEN OF VARIATION. I then did it with all the other weights as the 50 gram is tool large to measure with this scale, but every weight was not close, BUT PERFECT!!! For a precision reloader this is a great way to keep your scale accountable. :-) When I weigh a load, I want my cartridges to be as perfect and consistent as possible. Also because of the inherent danger of loading too much powder in casing is dangerous to both the firearm and myself, this little inexpensive tool gives me the peace of mind to know that I am right on because my scale is extremely accurate. Every reloader should own one. For only 12 bucks, you get a great resource that keeps you safe and consistent. Sure the plastic tweezers are not the best for placing the 20 grams on the scale, but if you are delicate and careful when picking the larger weights up, it is possible as I didn't drop a weight once. For all you exactitude people out there, THIS IS A MUST HAVE! ### ⭐⭐⭐⭐ almost perfect, very easy to modify and make complete *by A***N on May 4, 2014* Awesome value, useless tweezers, sadly missing the 100g weight that would make the kit complete. I bought a 100g weight hoping i could modify the box to fit it into the space that seemingly was made to fit it so that i could have a complete set that I could use to calibrate my new 200g scales. (both of which need 200g but one of which needs both 100g and 200g) I used a razor knife to separate the inner frame from the box, pulled out the inner frame from the box, then i used a forstner bit size 7/8 to drill the bottom out of the 100g spot. The foam in the lid was too tight for the box lit to close w/o distorting it so i used a 5/8 fortner bit turned backwards by hand on the foam to cut a nice circle, using the same trick i cut a circle in a piece of smooth cardboard and pressed down on the foam so the cut circle would 'pop up' through the cardboard and used an extendable razor knife to slice off about 80% of the thickness of the foam; now i have a complete set including 100g individual weight and enough other weights i can easily calibrate my two 200g scales. I managed to 'tiddly wink' one of the 20mg weights across the room and lost it and am pretty sure the kit came with a 5mg weight that went missing on first use; so word to the wise be very careful opening the ziplock bag with the micro weights! My new scales have 0.01g precision and all the weights appear to be well within 0.01g tolerance as i've been getting exactly repeatable measurements. the mg weights could be made better and with consistency (e.g. all stainless steel so they won't disappear in the presence of a magnet) and it would be *really nice* considering the size of them and the negligible cost, that there might be some spares! That said it would be a solid 5 stars if it had the mystery 100g spot filled with a 100g weight and if the tweezer included wasn't pointlessly useless (wouldn't open enough to pick up the 5g weight and broke when trying to stretch it open big enough to do so, also wouldn't grab the mg weights so really literally useless). Super happy on the purchase and would most definitely buy again. (and modify again and through out the useless tweezer again) ## Frequently Bought Together - American Weigh Scales Calibration Weight Kit WGHTKIT, Class M2 - American Weigh Scale Gemini Series Precision Digital Milligram Scale, Silver 20G X 0.001G (GEMINI-20) (Silver) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/1749653-american-weigh-scales-class-m2-14-piece-small-calibration-weigh](https://www.desertcart.sg/products/1749653-american-weigh-scales-class-m2-14-piece-small-calibration-weigh) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-23*