Irwin (928) 11104 IRWIN Unibit High-Speed Steel Metric Hole-Enlarging Step Drill Bit, No.4M (11104)

11104 Unibit High Speed Steel Metric Step Drill. No.4M 4 mm – 22 mm (2 mm steps) – Carded. Standard 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. Description: No.4M. Hole Sizes: 4 mm – 22 mm (2 mm Increments). Number of Holes: 10 steps. Hex Shank Size: 3/8″.