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 Tools: It removes material from the edge of the hole, cutting a disk of material. Perfect for installing locks, knobs in doors and cabinets or for drilling larger diameter holes through desks etc. The chip will automatically be removed from these two side holes. High-quality materials: The yellow tip is made from high-quality brass, which is wear-resistant, rust-resistant and durable. This bit will work great in drilling carpentry holes. 4241 steel high speed drill bit is sharper and has longer life than traditional drill bit. Convenient: There are 5mm and 1/4 inch drill bits for you to choose to drill holes of different sizes, hex shank design.