50 Pcs Titanium Twist Drill Bit Set by Volterin - HSS Cobalt Metric Drill Bits" 1.0mm - 3.0mm" for Metal, Steel, Wood, Plastic, Copper, Aluminum Alloy, Stainless Steel Sets Small Drill Bit

Is fractional inches, not metric. The cover of the box states, "99PC Titanium Coated HSS 1.5mm -10mm Twist Drill Bits Set" followed by a list "Kit includes" with a list of metric sizes such as 1.5 mm, 2.0 mm, and on down to 8.0mm and 10 mm and the photograph of the inside of the metal box shows metric size and the actual product shows bins with metric sizes. HOWEVER, the actual drill bits are all fractional inch sizes. For example, the bits in the 8.0 mm bin are stamped on the drill bits as "5/16" and a little arithmetic converts 5/16 inch to be 7.9375 mm. That dimension is a long way from "8.0mm" The metal box and bins are good, the quality of the bits (other than being completely the wrong sizes) looks good. The one star comes from the product being completely misrepresented by the box package, the box internal labeling, and product listing as a metric drill bit set.

I measured these bits with precision calipers, but I didn't need precision calipers to show that these bits were all over the place with size differences. One or two out of each size I have checked are correct to within a tenth of a millimeter. Especially with these sizes these errors are accounting for over, in some cases a 30% difference in what size they should be. The grind on the tips of these bits are not even either. It's like the have someone who does it freehand for them. I've had worse but also paid much less for them.

I normally never leave reviews, but these are an absolutely horrible product. many of the drill bits came bent, and are therefore unusable with a drill. However, almost ALL the drill bits came unsharpened and with no point. It looks like they had one long stock piece, cut it at different lengths, and packaged them as drill bits. The drill bits are literally flat on the ends. It seemed like such a great deal for the price, but now it makes sense. These won't drill into anything. Spend your money somewhere else.

I got these to worn on my sprinter van and they work really well. They fit tight and I haven’t broken one yet. This and a set of star screwdrivers are all the specialized tools I have needed to work on my van. Well, in addition to my normal tools and the scanner.

The price / quantity is great, but the quality is pretty low. Several were wobbly and bowed more easily when used with aluminum on my dill press.All of the bits had either no marking, or imperial size markings on them (for example instead of 4mm it was 5/32)

I give 2 stars because the bits are very sharp and the drilled hole was nicely smooth but...The sizes are wrong, they are labeled in millimeters but they are probably imperial. The 10mm actually is 9.6mm. I returned because I needed exact holes.

Your browser does not support HTML5 video.  Bits came in a metric labeled container but are imperial......

I need to replace my car's brake rotors and need E Torx female socket to take the brake mounting brackets off so I ordered this socket set, came fast and has the size I need, I give it 4 stars only because they are loosely pacakged in a plastic bag so you could easily lose one or two sockets, otherwise, they work fine for my needs.

Eigentlich wollte ich meine neue Fliesen nicht Bohren. Nachdem mir die geklebten Handtuchhalter jetzt mehrfach runter gefallen sind habe ich mich doch für das Bohren entschieden. Mit den normalen Beton Bohrer bin ich ohne Schlag nicht durch die Fliesen gekommen. Da ich das Risiko das durch den Schlag die Fliesen Platzen nicht eingehen wollte habe ich mich für diesen Bohrersatz entschieden. Mit diesem Bohrer lässt sich ohne Schlag Löcher in die Fliesen bohren. Ich bin zufrieden.Wenn euch meine Bewertung bei der Kaufentscheidung geholfen hat würde ich mich über ein Like freuen.

so good I bought 2 sets, goes through concrete and masonry like butter i have used them so much my usual masonry impact bits would be dull chipped broken. These beauties work so well no hammer drill needed chew through walls faster with a cordless drill, I was down right brutal with 2 of them testing to destruction only one gave in but if you dont over run them and cool them with a little squirt of water when drilling they should last years and still look like you've only drilled 2 holes I was so brutal 16 holes in a row high speed just bearing down it just kept going through until the 16 when it started to bind and i looked and the red hot tip and just snapped off similar job but spraying water when drilling and giving it time to cool between jobs and it looked like the ones in the pack just not as shiny seriously good kit. So took that been through a concrete wall bit 16 times but treated nicely and put in my drill press went through a tile with nice clean cuts through glass with out breaking the glass a clean hole that didn't require sanding.

Unfortunately my first job using the 8mm bit got over half way done but the end of the bit broke off while drilling the 4th hole (out of 6) to fit a shower grip handle which needed quite deep screws to provide a safe firm support. I was drilling slowly and the bit went through the tiles very efficiently, but behind that was around an inch of brick and then a half inch of wood. Wood seems to be a real problem, with the bit heating up rapidly, leaving me with the impression that this style of bit was far too easy to break for deep holes.I returned the bits using the normal Amazon returns system. I finished the job sticking to standard masonry bits, using drafting tape to give a grip start on the tiles. Were I to do a similar job I would only use the tile bits to make the initial holes through the tile and the start of the wall, then go back with masonry bits to create the rest of the hole. It would be useful if the instructions suggested that the bits were used in this way, rather than leaving you to believe that the bits can do this sort of job if you just drill slowly.

We used to drill into new porcelain tiles both before and after fixing. Found that you get two to three holes with each bit, but at the price this is reasonable when compared to some more expensive bits on the market that only do the same job. The main trick is to keep the drill site and bit constantly wet and drill in short bursts, We found spraying with a spray bottle worked well. This works even better if one person drills and the second sprays constantly. If you use the bits dry without water they will burn out very quickly and you will be lucky to complete one drill hole with each bit. We were impressed enough to buy another two packs.

While doing tiling in the bathroom i need some drill bits to put up a few items and as i had no experience in this area i nearly just use a normal drill bit but researched just before and i am glad i did,its been made clear its best to use specific item made for drilling into tiles so i decided on this pack as it was a decent price compared to some others.Worked like a dream for me as an amateur and had absolutely no issues, a experienced tiler said not to use them more than a few times per item as they will blunt,not sure why he said that as i use the same one about 8 times with no degradation on the drill bit.Excellent item and fit for the purpose intended.Productivity 10/10Value 9/10