• Includes 3 pieces
• 4 mm to 12 mm in 1 mm increments
• 4 mm to 22 mm in 2 mm increments
• 4 mm to 35 mm in 2 mm increments
• Step drill set for making holes in thin sheet metals
• Titanium-nitride (TIN) coated step drill with a surface hardness that makes the tool last 4 to 5 times longer than ordinary step drill bits
• Same surface reduces friction, resulting in a tool that runs cooler and effective, self-lubricates while running dry
• Self-centering point
• Shank size 1/4" (6.35 mm) and 3/8" (10 mm) and 1/2" (12.7mm)
• For making holes in thin metal sheets
• Last up to five times longer than ordinary step drills
• Titanium-nitride (TIN) coating with a surface hardness
• Self-lubricates while running dry