Jon Bhandari Tools Hinges Bit, made from hardened steel, is used for perforation/boring of wood products, installation of spherical door knobs, drawers, splint, etc. This hinge boring bit is specialized in drilling clean holes in soft and hard wood. Two spurs and centering point to give the perfect solution to repeated, clean and accurate hole cutting time after time. The sharp center spur accurately locates the center of your hole. You can drill flat bottomed holes without splintering & drill straight, angled and overlapping holes. It should be used with power drilling machine.