Material: The drill bit is made of tungsten steel, high wear resistance and heat resistance, good toughness. Durable, drilling chamfer, a more practical solution. Three-point positioning: Three-point centering is better, not easy to slip and no offset. Precise and fast drilling. Fast chip removal: The 5-flute wood drill bit has large chip flutes for quickly removing sawdust to achieve a smooth surface on all types of hardwood, cork, or aluminum. Removable and adjustable: Adjustable depth of the wood cutter sleeve with a wrench, 7 different sizes for your different needs. Different size: The turned wood pieces are 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 10 mm. Round handle design, suitable for bench drills, impact drills, and chucked drills on hardwood or wooden floors. Features: Suitable for wood, plastic, rubber, etc., ideal for production, maintenance, or mobile drilling. The drilling length can be adjusted for different length screws by simply loosening and tightening the headless