7pc Tapered Countersink Drill Set
Bit Sizes: #5, #6, #7, #8, #9, #10, #12
Drills a tapered pilot hole which allows screw to have maximum bite
Adjustable stop collar allows you to set the depth of countersink
Worked just fine , excellent deal for the price.
I recently purchased this set and when they arrived I was happy to get to use them, but when I took them out of the container I noticed there was something wrong. On 4 out of the 7 countersink and depth stop collets where sitting crooked on the tapered drill bits, I first thought that one of the allen set screws were just over tightened so I went to loosen the set screws and that is when I found out that all 4 of the set screws on all of the countersink bits were cross threaded and nearly impossible to get out, once I did get them out I retapped them and then I was able to align the countersink collets and the drill bits. Unfortunately that didn't work, so I took them all apart again and and that is when I noticed that the depth stop and countersink collet were both milled crooked so now I don't know what to do to fix them or if I am going to return them, but I guess that is what you get for only paying $17 for a set of countersink bits.