Widely Used: These hinge jaws can reliably and accurately center holes for mounting hinges and other types of hardware. Widely used on wood and plastic. PROFESSIONAL TOOL: It removes the material from the edge of the hole by cutting off a slice of material. Perfect for installing locks, knobs in doors and cabinets, or drilling larger diameter holes through desks, etc. The chip is automatically removed from these two side holes. High Quality Materials: The yellow tip is made of high quality brass, which is wear-resistant, rust-resistant and durable. This drill bit is great for drilling carpentry holes. Made of 4241 steel, the high-speed drill bit is sharper and lasts longer than traditional drill bits. Specifications: Material: 4241 HSS, Brass. Color: As in the picture. Drill Size: 5mm Hex Shank Size: 1/4 inch. Package Contents: 1 x Hinge Drill Bit