High Speed Steel Metric Self-Starting, 4 mm-22 mm, 10 Steps

Features: Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates | 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