Irwin 10239 IRWIN Unibit High-Speed Steel Fractional Self-Starting Step Drill Bit, No.9 (10239)

10239 Unibit® High Speed Steel Fractional Self-Starting Step Drill. No.9 7/8" and 1-1/8" (1/2" and 3/4" Knock-Out). Standard Features: Single-flute cutting edge for greater control through steps. Hex shank prevents slipping in drill chuck. Also available with (TiN) coating for longer life. Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. SpeedPoint® tip for fast starts. Description: No.9. Hole Sizes: 7/8" and 1-1/8" (1/2" and 3/4" Knock-Out). Number of Holes: 2 steps. Hex Shank Size: 7/16".