Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"

I had a use case where a machine screw had broken off in a location that wasn't easy to access. I decided versus pulling the piece of equipment apart to improve access, I'd spend the money on a set of these with the hopes it would catch as I was drilling out the broken off screw. The screw broke during installation, so I wasn't worried about rust or anything like that, and the roll of the dice paid off. As I slowly increased the size of the bits, one finally caught and backed it out. I replaced the machine screw with a new one and job done. This set saved me about an hour of disassembly and for me, that made the set worth the price. I don't know long-term how they'll hold up, but for me, these will be used infrequently and as I mentioned, they've already paid for themselves, so future use is just money in the bank. The case is nice and the quality seems good, so no regrets here.

This drill bit set is great for general-purpose use. I like that it includes a wide range of sizes—from small bits for precision work to larger ones for bigger projects—making it a versatile addition to any toolbox.The bits feel durable and perform well on wood, metal, and plastic. The included case is a big plus too, keeping everything organized and easy to carry around.Overall, a solid, well-rounded set that’s perfect for DIY projects or regular home use.

These are pretty good drills with minimal runout. They have worked well and cleanly in wood and steel so far. The case, however, is very cheap, thin, and bent already on delivery. I had to do some repair to make it usable. Still, the drills are pretty good quality for such a great price.

I had a broken 1/4” bolt in a hard to get to spot. The bolt was rusted in which made it worse. I drilled a small hole through the bolt hoping that it would back out but it didn’t. I put more penetrating oil and let it soak overnight. The second larger bit caught and backed the bolt right out. Good bits, did a great job. I like the case that they came in too.

Bought these to drill through so.e 420 SS plate. They did a fine job. For really tough stuff you have to start with the smallest size, use cutting oil, set the drill on low speed, and drill through the piece. Once you get through, step through the bits increasing the size of the hole until it os the desired size. This set did just as well as my last set of Dewalt bits and they cost 1/3 the price. I recommend!

Drill bits seem ok, but packaging was awful. The metal case and holders the bits came in were unusable. Looked like a bomb went off. Case destroyed and bits everywhere.

Product is a steal at 120$ given the hardness of the bits and the vast selection you get with the 115 or so bits that come with it.The case may arrive with a busted brass rivet or bent case like mine, but all the bits were still held in place with the Styrofoam which is more important for those small bits that are unlabeled.If the rivet is broken, it's pretty easy to just pop in a new one from aluminum or steel rivets I had on hand.The bent sheet metal case? It's thin stuff so it was easy to bend straight by hand.My biggest issue is that a few of the bits I used (#44 size specifically) didn't run true in the drill press. But runout wasn't so big of an issue as I just used a starter drill bit and then chased that with the #44 drill bit.Performance-wise though, hard to beat. The bits cut like butter through mild steel and they don't shatter easily like those cheaper titanium plated drill bits. In the end, worth every penny.Also, the 8 or 9 bits I measured with a micrometer were indeed true in size. Very pleased with my new set and worth the money 💰

Great quality at a much lower price than the name brands you get in a local store