Irwin - Tools Cobalt High-Speed Steel Drill Bit, 29-Piece Metal Index... Sold by: Amazon.com LLC (Rating: 4)

I bought this set of drill bits because I was always needing a bit a tad larger or smaller than the bit I had available. This is a set from 1/16 to 1/2 inches by 1/64th. It's the "by 1/64th" that I bought the set. Now I can easily go a tad bigger or smaller. The bits cut very clean holes entry and exit but all new bits probably do. The real test comes after a year or so of use. These bits get 4 stars until I see them holding their edge after a year's use.