--- product_id: 15439391 title: "Master Lock Heavy Duty Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More" brand: "master lock" price: "S$65" currency: SGD in_stock: true reviews_count: 13 category: "Master Lock" url: https://www.desertcart.sg/products/15439391-master-lock-heavy-duty-disc-padlock-combination-stainless-steel-outdoor store_origin: SG region: Singapore --- # 70mm stainless steel body Tough-Cut boron carbide shackle 10,000 combo possibilities Master Lock Heavy Duty Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More **Brand:** master lock **Price:** S$65 **Availability:** βœ… In Stock ## Summary > πŸ” Lock in your security, unlock your peace of mind. ## Quick Answers - **What is this?** Master Lock Heavy Duty Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More by master lock - **How much does it cost?** S$65 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/15439391-master-lock-heavy-duty-disc-padlock-combination-stainless-steel-outdoor) ## Best For - master lock enthusiasts ## Why This Product - Trusted master lock brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Cut-Resistant Shackle:** Octagonal boron carbide shackle is 50% harder than steel, built to withstand bolt cutters. - β€’ **Trusted Peace of Mind:** Backed by a limited lifetime warranty from Master Lock, the industry leader in security. - β€’ **Customize Your Security:** Set your own 4-digit combination from 10,000 optionsβ€”no keys, no hassle, total control. - β€’ **Weatherproof & Scratch-Resistant:** Covered keyway and reinforced bumper protect against elements and daily wear. - β€’ **Unbreakable Stainless Steel Armor:** 70mm solid stainless steel body resists corrosion & wear for long-lasting security. ## Overview The Master Lock M40EURDNUM is a heavy-duty, weather-resistant disc padlock featuring a 70mm stainless steel body and a 10mm octagonal boron carbide shackle that offers superior cut resistance. With a customizable 4-digit combination and a reinforced design to prevent scratches and corrosion, it’s ideal for securing storage units, sheds, trailers, and more. This lock combines robust physical security with convenient keyless access, backed by a limited lifetime warranty for lasting reliability. ## Description Product Description The Master Lock Excell No. M40EURDNUM solid body padlock features a 70 mm wide stainless steelbody for strength, reliability and corrosion resistance. The 10 mm diameter octagonal shackle is 16 mm long and made of Tough-Cut boron-carbide, 50 percent harder than hardened steel, offering maximum resistance to cutting and sawing. The reinforced body bumper protects against scratches. The lock includes set-your-own combination convenience, with the need of the included reset tool. This padlock is ideal for self storage units, sheds, trailers, moving trucks, vans and more. The limited lifetime warranty provides peace of mind from a brand you can trust. Set Contains: 1 x padlock & reset key Review: Fantastic product and service - First off, customer service from The Big Red Toolbox is fantastic. I had a problem with the product (total fluke) I received and had it resolved very quickly. These guys know what they are doing. As for the lock its quality, it is fantastic. You will need to lube the lock up with some oil when you receive it due to some of the moving parts but after working the oil in for about a minute the lock works flawlessly. I can also say this lock will be a thief's nightmare, its very very hard to cut this off. You pretty much need an angle grinder to cut this thing off. Already received 2 locks, if I need any more I will return here for the same lock from the same seller. 100% recommend this product and company. Review: BE VERY CAREFUL RESETTING THE COMBO! - We purchased this lock for a storage. We followed the instructions. The lock looks strong but it does not work very well the rotating numbers are difficult to line up and you are never sure whether you have them in alignment or not as there is no definitive click even if you are using any set of numbers (you wouldn't want it to be definitive only when you had the correct 4). I used the code behind the key on the back and got the lock to open then I opened the bolt and inserted the little combination key and rotated clockwise then I set the new code. turned the key removed the key after turning it counter clockwise to set the new code closed the bolt and tried to open it with the new code and it didn't work. Then I tried to go back to the original code but it didn't open so then I tried multiple combinations used the new code but changing each dial either up one number or down one number on each code ring. Then I tried adjusting two at number rings at a time using the same methodology and never got it open again. So, it may be operator error but be careful because your will be in trouble. I thought i followed the intructions to a T but no such luck. Then I searched online to see if there was a number to call to try to reset it since I have the original combo and key. No luck. ## Features - Multiple padlock applications: For indoor and outdoor use; stainless steel discus padlock is ideal used for self storage units, sheds, trailers, moving trucks, vans and more.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit - Durable design: padlock has a stainless steel body construction and covered keyway for maximum weather resistance, and a reinforced body bumper for scratch resistance - High security combination: Set-your-own four-digit combination for convenience and security; 10,000 possible combinations - High security shackle: Tough-Cut octagonal boron carbide shackle that is 50 percent harder than hardened steel and fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks - Specifications: padlock dimensions (W x D) 7 x 3 cm; shackle (A x B x C) 1 x 1.6 x 2.1 cm; one padlock; reset tool included - Limited lifetime guarantee ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00HUWZRS6 | | Additional Features | Anti-Drill, Cut Resistant, Passcode Unlock, Resettable, Weather Resistant | | Best Sellers Rank | #377,667 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #647 in Combination Locks | | Brand | Master Lock | | Brand Name | Master Lock | | Color | Silver | | Control Method | App | | Controller Type | Hand Control | | Customer Reviews | 3.7 out of 5 stars 4,623 Reviews | | Finish Types | Zinc | | Global Trade Identification Number | 00798256159008 | | Included Components | 1 padlock | | Item Dimensions | 3.66 x 2.76 x 1.18 inches | | Item Type Name | MASTER LOCK High Security Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More | | Item Weight | 0.31 kg | | Item dimensions L x W x H | 3.66 x 2.76 x 1.18 inches | | Lock Type | Combination Lock | | Manufacturer | Master Lock | | Manufacturer Part Number | M40EURDNUM | | Material | Stainless Steel | | Material Type | Stainless Steel | | Model Name | Excell Disc padlock | | Model Number | M40EURDNUM | | Number of Items | 1 | | Number of Pieces | 1 | | Recommended Uses For Product | Security | | Special Feature | Anti-Drill, Cut Resistant, Passcode Unlock, Resettable, Weather Resistant | | Style Name | Combination | | Unit Count | 1 Count | ## Product Details - **Brand:** Master Lock - **Item dimensions L x W x H:** 3.66 x 2.76 x 1.18 inches - **Lock Type:** Combination Lock - **Material:** Stainless Steel - **Special Feature:** Anti-Drill, Cut Resistant, Passcode Unlock, Resettable, Weather Resistant ## Images ![Master Lock Heavy Duty Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More - Image 1](https://m.media-amazon.com/images/I/61wFml0VK7L.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fantastic product and service *by J***D on July 21, 2017* First off, customer service from The Big Red Toolbox is fantastic. I had a problem with the product (total fluke) I received and had it resolved very quickly. These guys know what they are doing. As for the lock its quality, it is fantastic. You will need to lube the lock up with some oil when you receive it due to some of the moving parts but after working the oil in for about a minute the lock works flawlessly. I can also say this lock will be a thief's nightmare, its very very hard to cut this off. You pretty much need an angle grinder to cut this thing off. Already received 2 locks, if I need any more I will return here for the same lock from the same seller. 100% recommend this product and company. ### ⭐ BE VERY CAREFUL RESETTING THE COMBO! *by D***N on June 18, 2025* We purchased this lock for a storage. We followed the instructions. The lock looks strong but it does not work very well the rotating numbers are difficult to line up and you are never sure whether you have them in alignment or not as there is no definitive click even if you are using any set of numbers (you wouldn't want it to be definitive only when you had the correct 4). I used the code behind the key on the back and got the lock to open then I opened the bolt and inserted the little combination key and rotated clockwise then I set the new code. turned the key removed the key after turning it counter clockwise to set the new code closed the bolt and tried to open it with the new code and it didn't work. Then I tried to go back to the original code but it didn't open so then I tried multiple combinations used the new code but changing each dial either up one number or down one number on each code ring. Then I tried adjusting two at number rings at a time using the same methodology and never got it open again. So, it may be operator error but be careful because your will be in trouble. I thought i followed the intructions to a T but no such luck. Then I searched online to see if there was a number to call to try to reset it since I have the original combo and key. No luck. ### ⭐⭐⭐⭐ Apply WD40… *by K***. on November 13, 2025* The first one I got seized up when I tried to change the combination. It was very difficult to turn the dials and the mechanism wouldn’t turn properly. The second one I got was the same, however, after applying a bit of WD40 it worked great. I think these units might be a bit old and the lubricant has dried up. The lock itself is very durable and appears to be very strong ## Frequently Bought Together - MASTER LOCK Heavy Duty Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More - BRINKS – Heavy Duty Combination Padlock – 80mm Chrome Plated Lock with Hardened Steel Shackle – Resettable Security Lock for Storage Lockers, Toolboxes, Outdoor & Indoor Sheds, and More - Master Lock ProSeries Brass Padlock, Set Your Own Combination Lock, Commercial Grade Locks with Code for Tools, Fences, Gates, 2-1/4 inches Wide, 1177D --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/15439391-master-lock-heavy-duty-disc-padlock-combination-stainless-steel-outdoor](https://www.desertcart.sg/products/15439391-master-lock-heavy-duty-disc-padlock-combination-stainless-steel-outdoor) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-27*