Review on Efficiently Tackle Hard Metal Projects With Aiyun'S 6-Pack Metric Drill Tap Set For Steel And Aluminum by Tim Jolivette

used the new bit to drill one pilot hole in a piece of teak prior to screwing on another piece.When I went to screw in a second pilot hole and the bit cut partway in then turned freely in the base, when I tried to reverse the bit out of the hole the base came off the bit and we had to remove the bit from the wood with a small channel lock plier.These things are nothing more than junk. I would not recommend the purchase of them to anyone, whether friend or enemy.