Features:

•  HSS with heat treated
•  Titanium Nitride Coating
•  last up to 4-5 times than ordinary drill bits
•  Drill round holes in most metals, plastic, wood...etc
•  Drill round holes in most metals, plastic, wood...etc
•  Self-starting tip will not skid
•  No center punching Or pilot hole required
•  Compatible with all electric drills and drill presses
•  Hex Shank
•  12 Hole sizes in 1/16" increments
•  Sizes: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"