Made of zinc alloy, carbon steel, and high-speed steel drill bits, it has high strength, high hardness, and sturdy, wear-, not easy to deform or break, and has a long service life. High-speed steel drill bits provide excellent cutting performance, and drilling is stable, fast and neat. The self-centering design facilitates precise positioning of drilling holes, and the opening design of the shell removes chips smoothly. Self-centering drill bit sets are widely used in cabinet and door hinge installation, furniture drilling, woodworking applications, etc., to improve your work efficiency and are suitable for professionals and DIY enthusiasts. You receive 3pcs self centering drill bit(includes 1/8inch, 7/64inch and 3/32inch), 1pc 60mm black knurled extension and 1pc hex wrench. Practical set to meet your . The drill bit is equipped with a 1/4-inch hexagonal shank, which is highly versatile and compatible, and adapts to various chuck sizes. Removable design so that you can replace the worn drill bit to extend the service life., Weight: 0.2868654953144 Pounds, Manufacturer: Flaroey