design: The Hinge Drill Bit features a unique design and precise stamping. Sawdust automatically discharges from the of the holes on both sides, preventing blockage. Hinge Bit. Manufacturing: The Hinge Center Bit is made of speed steel (HSS). The HSS 4241 drill bit is sharper, harder, rust resistant, and delivers performance compared with traditional drill bits. Hinge Center Bit. Powerful function: Widely used in wood and plastic applications. Chips are automatically removed from the two side holes. The drill sleeve can be accurately positioned without moving and is suitable for installing door hinges. Hinge Drill Bit. Product size and options: The Self Centering Hinge Drill includes 5 mm and 1/4 inch drill bits to drill different sizes. Suitable for carpenters, cabinet makers, furniture manufacturers, and other woodworking industries. Hinge Opening Tool. Applications: Installing door hinges in wooden interior or exterior doors. Attaching cabinet hinges for kitchen and bathroom cabinetry. Furniture production and component assembly in carpentry, cabinets, and wardrobes.