Irwin (928) 10311ZR 11 7/8IN - SINGLE HOLE

10311ZR Unibit High Speed Steel Fractional Self-Starting Step Drill. No.11 7/8" (Single Hole) - Carded. 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. Description: No.11. Hole Sizes: 7/8" (single hole). Number of Holes: 1 step. Hex Shank Size: 3/8".