Non-Core Bit is best used for coring small holes from 5mm to 15mm. Use: Wet and DryApplication: Granite, Engineered StoneMachine: Angle grinderArbor: 5/8"-11FMax RPM: 6,500Tip: 10mmNon Core Drill BitAvailable Options Diameter (inch) Diameter (mm) Tip height (mm) 3/16 5 10 1/4 6 10 5/18 7 10 5/16 8 10 3/8 10 10 1/2 12 10 4/7 15 10 5/8 16 10 3/4 19 10