Irwin 10502 Unibit 3 Piece High Speed Steel Step Drill Bit Set (#1, #2, #3 Bits)
• Single-flute cutting edge for greater control through steps
• 3 flatted shank prevents slipping in drill chuck
• New SpeedPoint tip penetrates faster than previous Unibits and prevents walking
The Irwin 3-Piece General Purpose Unibit Set creates perfectly round holes in metal, plastic, wood and other thin materials without center punching. Ideal for steel, copper, brass aluminum and other thin materials, it automatically deburrs the top side of the hole. A single-flute cutting edge provides greater control through steps. The three-sided shank is designed so it won't slip in drill chuck. This set features an easy-to-sharpen, self-starting tip that eliminates skidding and the need for center punching. Unibit #1 High Speed Steel Step Drill Bit 1/8" - 1/2" (13 Steps - 1/32" increments), Unibit #2 High Speed Steel Step Drill Bit 3/16" - 1/2" (6 Steps - 1/16" increments), Unibit #3 High Speed Steel Step Drill Bit 1/4" - 3/4" (9 Steps - 1/16" increments).