ENERTWIST 230 PCS Drill Bit Kit Set for Metal and Wood Titanium Coated HSS

This is the best deal in Amazon. The bits are about the same quality of those in Home Depot at $15 for a set of 20, so at this price they are an incredible deal. They last about the same as other titanium bits, and don't break easily (today I broke two of the smallest size in a handheld drill, after 16 holes in hardened steel, which is about average for titanium drills in my hand). There are some of the 1/16 that are improperly cut, with a slightly eccentric tip that makes them unsuitable for some tasks (see pic), but it's less than one in ten of the smallest ones and I only saw one of the 3/64s that was slightly eccentric, and none of the bigger ones. About hardness, I made eight holes with a 1/4 bit on the same hardened steel, and I could only see very slight wear on the bit under a microscope at the end (see other pic) which on the same steel caused similar damage on the DeWalt bits I've been using. As always, proper technique is critical for drill bit durability, but if your know how to drill, these will last a very long time.

Great drill bit set for throwaways. They don't last long, but for the price, they are great for projects that destroy bits.

A lot of bits . Good variety. However the bits were all scrambled together due to not very secure packing in the drill container. Had to resort.

Drill bits of different sizes. Can't go wrong a bit for everything! Very sturdy and priced at the right price!

Really good drill bits

I haven’t used any of the bits, but if the way they were packaged is an indication of quality control, my expectations are not very high. So this is more a review of the packaging and storage case than the bits themselves. When delivered, I could hear a lot of movement of loose bits inside the sealed box. Although the case (inside the delivery box) was closed and latched, there were several of the smaller bits loose in the box. Opening the case revealed that many bits had shifted and intermixed. I really would have thought the contents to be better secured. They were not. Obviously the smallest sizes are not able to be secured inside the case - they can (and did) escape. They were also mixed in with many other sizes. That was poorly done.

Kit was complete and bits were sharp. Have only used a couple of them, but the performance,so far, has been great. Good value for the money.

These are the absolutely worst bits I've ever used. And *I've* used the ones from Harbor Freight! A friend, who is a machinist, was helping me with a project on a milling machine, and I handed him these bits. The first two were completely dull right out of the package - they wouldn't drill Delrin plastic!!! The third one kind of worked, but we ended up switching to another brand because it wobbled and wandered. Since then, I've tried a dozen of them, both in a drill press, and in a hand drill. I was drilling through wood block covering tubing from a bicycle frame. In the hand drill, they struggled through the wood (oak) like I was drilling concrete, and when they hit the steel tubing, they just ... stopped. They'd sit there and spin against the tubing until they got so hot the wood started smoking, without ever penetrating. On the drill press, they would go through the wood, then start to penetrate the tubing, stop cutting (because they're DULL), and snap in two. I pulled out a slightly used Harbor Freight special, and it went through the wood and tubing effortlessly, in both the hand drill and the drill press. With a lot of these bits, you can just look at the end and see that they're ground off-center, or with too much webbing left. Some of them have burrs on the edges, and some have chips missing from the cutting edges. Horrible, horrible quality. You'd stand as much of a chance of drilling a good hole using a sharpened piece of coat hanger wire as you would with these stinky things. I've been buying and using bits for 50 years, and I don't think I can remember any that were as consistently BAD quality as these toys are. I mean, I know they're cheap, crappy bits - you can't get a couple pounds of good drill bits for $40, but I was expecting to at least be able to use each of them once or twice. Please do yourself a favor, and buy something else. I wouldn't wish these on my worst enemy!