Features:

• 1/2" Hex Shank
• 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
• Self-starting tip will not skid
• No center punching Or pilot hole required
• Compatible with all electric drills and drill presses
• 12 Hole sizes in 1/16" increments
• Sizes: 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8"