DrixetDiamond High Speed Steel (HSS) Twist Drill Bit Set - 20 Heavy Duty Twisted Bits, Metric Sized Micro Bits for Drilling Small Tiny Holes in Wood, Soft Metal, Plastic, Jewelry

Drill bits work pretty well depending on drilling situations. I'd recommend these over maybe some of the alternatives. Have no idea of the durability yet buy most bits used to drill metal and, cermanics , glass have a relatively short life span.

Hopefully I was sent the wrong product by mistake but these are very clearly NOT diamond coated. They are regular twist drill bits. Still very useful to me as they are MICRO sized and I am very happy about that for drilling small resin or wood pieces, but they aren't actually what I ordered and aren't going to be any use drilling stone, porcelain or bone china. Now it puts me further behind on a time sensitive project, arg.

The top of the case is supposed to slide so that you can shake the selected bit out through the hole without dumping all of them. Good idea. Terrible execution. The larger bits do not fit in the slots, so they stick up, jamming the top. I ended up removing the lid entirely, exposing all of the bits and, of course, dropping a couple. Since I just bumped the case sitting on my desk and a couple bits came out, I'm likely to transfer these to my old round case that has most of the bits missing.I've used two of the larger sizes in my hand drill while making a dollhouse refrigerator. They make holes as they're designed to do.

The case is crap but that’s not what I bought it for so that part is ok. The bits take quite a while to drill into anything hard , not sure if it’s them (they don’t feel very sharp) or my material but I’ll keep them around for small projects

I just got these bits and have not had a chance to use them yet but I looked them over with a magnifying glass and they seem to be heavily covered with diamond pieces so they should work great for drilling through tile and stone. They are really tiny so I will need to be careful not to put to much pressure when drilling so I don't snap them. I would like to find a set that is a little bit larger diameters like 1/16" to 3/8". I will update once I have used them which should be in the next few weeks or so. Good find for a really good price.

First problem: the seller sent me the wrong item. The description reads "diameters of 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.2, 1.3, 1.4, 1.5 and 1.6 mm" but the product I received contained bits in US sized #61 through #80. So not only do I not have metric sizes, but the drill bits supplied only cover the size range 0.343mm to 0.991mm — a much narrower range than advertised.Second problem: the case that the bits came in is almost useless. In theory you slide the clear part of the case across until the hole is opposite the bit you want, and then tip the case to let the bit fall out. In practice the clear part is very difficult to move, and the more force you exert, the more likely you are to break the case altogether, or damage one of the bits. Bonus point: many of the drill bits are so large in relation to the slots in the case they they don't move at all when you tip the case. Good luck figuring out how much force it's safe to exert!Overall: a company that seems to be unwilling to pay attention to detail, just about every chance they get.

The drill bit are as advertised. They drill holes with ease and with precision. The only thing I dislike about the product is that it comes in a little blue container that is hard to open. The first time I attempted to open it a bunch of drill bits scattered all over the floor and took some time to recover.However I would definitely by again.Word to the wise, DO NOT use them to drill plastic, plastic will just cake on to the bit.

Great product. They worked for exactly what I needed them for with a dremel rotary tool and a drill press stand. Very happy with them, especially for the price.