Material: Yellow tip made of brass, wear-resistant, rust proof, and durable. Application: Widely used in wood and plastic, with precise deposition and uninterrupted drilling bit: 4241 three high-speed drill bits are more durable and have a longer service life than traditional drill bits. Correct: Durable drill bits are reliable and accurate, and are the core for installing hinges and other types of hardware. Easy to use: Wood chips can automatically discharge charges from the other side of the drill bit, and the drill bit will not block. There are 5mm 1/4 inch drill bits available for you to choose from, used for drilling different sizes. It can automatically remove debris from the holes on both sides, and the drill bit will not get stuck. It can be applied to wood and plastic drill bits. Wear resistant, rust resistant, durable, and can be used for a long time. Size: 11x9x1.5cm/4.33x3.54x0.59 inches. 1/4 inch: drill bit: 1/4; Aperture: 6.35mm. 5mm: Drill bit: 5mm; Aperture: 5mm. Provide two different sizes of 1/4 inch and 5mm. Complete equipment, including 2 * hinge drill bits