Irwin 10311ZR Unibit 11-7/8" High Speed Steel Fractional Self-Starting Step Drill Bit

10311 Specifications:
•  Size: 7/8"
•  Maximum Material Thickness: 1/2"

High Speed Steel Fractional Self-Starting Unibit 10311 Features:
•  Single-flute cutting edge for greater control through steps
•  3 flatted shank prevents slipping in drill chuck
•  Also available with titanium nitride coating for longer life
•  New SpeedPoint tip penetrates faster than previous Unibits and prevents walking
•  Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates