Update I used again later the next day. Countersink MFD for saw table. The third largest would only go 1/2 way to the lip before just spinning and burning my table. He didn't stop or any other excuse, he just didn't cut any deeper. Now I understand that this is garbage. They're not even worth the few dollars they paid for. I am very disappointed in bits other than a small one. The little one did a wonderful job, but the rest is junk time. I'm sending it back for a refund and planning to buy more expensive, better countersink bits. I've used them a few times. I like them, they are well made, very thick and sharp for the needs. I have NOT used them on metal yet so will update asap. I use them on a tree. it depends on what wood you're drilling into. 2x4 The little one shut up as soon as he got to the edge. Stuck in a spot after each hole that I had to dig with a knife and the tip of a screw. Although it eats through wood easily. Singing on MDF is one size bigger. There were no problems, the spout was large enough, it never clogged and worked perfectly. The only thing I didn't like was the sizing but that's my fault because I could have bought more options for the set but I didn't. will be a good addition to my tools. Be sure to plan to save. Inwill upgrade when used on metal. I have not been paid for ANY review I have ever left. As always, this is just my opinion, written with my eyes to help others. If you find this review helpful, please upvote so Revaiinian browsers can better learn, research, and understand how the products work for them.!. Thank you and happy shopping