- Works with all 35mm concealed hinges- Shank fits perfectly in Concealed Hinge Jig drill guide- Shoulder ensures accurate stop-collar positioning (stop collar sold separately with Concealed Hinge Jig)- Spurs create clean hole edges without tearout- Large carbide cutters bore a flat, smooth holeBore clean, perfect hole Kreg KHI-BIT - 35mm Concealed Hinge Bit