Widely Used: These hinge jaws can reliably and accurately place center holes for mounting hinges and other types of hardware. Widely used in wood and plastic. PROFESSIONAL TOOL: It removes material from the edge of the hole, cuts discs of material. Ideal for installing locks, knobs in doors and cabinets or for drilling larger diameter holes in tables etc. Chips will be taken out from these two side holes automatically. High Quality Material: The yellow tip is made of high quality brass, which is wear-resistant, rust-resistant and durable. This bit is perfect for drilling holes in wood. High-speed drill bits made from 4241 steel are sharper and last longer than traditional drill bits. Convenient: There are 5mm and 1/4 inch drill bits so you can choose to drill holes of different sizes, hexagonal shank design.