21 mm tungsten carbide auger for wood hole saw, drilling hinge holes for woodworking (blue, grey)

Drill bit: Drilling diameter: 21 mm / 0.83"; Shank size: 7 mm / 0.28"; Drilling depth: 48 mm / 1.89"; Overall length: 77 mm / 3.03". Thick carbide cutter and solid hardened steel body, round shank bits for woodworking. Applications: Can be used for drilling holes in wood and plastic products, furniture, door hinges. Used for cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass, etc. The drill bit is intended for general use. Features: Tungsten carbide cutting tip with special heat treatment for a sharp cutting edge, high hardness, no burrs, and long-lasting use. Curved, arc-shaped head design for easy chip removal and more efficient drilling. How to use: Suitable for bench drills, vertical drills, and CNC cutting machines. When working with hardwood or other hard materials, inject the drill bit with water to improve drilling quality and accuracy and extend the life of the hole opener. Tips: Maximum speed: 2000 RPM. Use on desktop (fixed) equipment and NOT for use on handheld power tools (such as a hand drill or electric drill). Cannot drill metal or non-ferrous metals. To avoid damage, ensure there are no nails or other metal objects in the wood before drilling. The cutting edge and point of the hole opener should be sharpened regularly.