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
• Self-starting tip will not skid
• No center punching Or pilot hole required
• Compatible with all electric drills and drill presses
• 10 Hole sizes in 1/18" increments
• Sizes: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8"