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. Description: 5mm - 28.3mm Hole Sizes: 10 steps Number of Holes: 5mm Weight(KG): 0.100