Forstner Drill Bit: Drilling diameter: 17mm / 0.67"; shank size: 7mm / 0.28"; drilling depth: 48mm / 1.89"; total length: 77mm / 3.03". Thickened carbide cutter and solid hardened steel body, round shank forstner bits for woodworking. Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinges. Suitable for cutting wood, plywood, solid wood boards, MDF, plastics, and fiberglass. Forstner drill bit is for general purpose use. Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, clean cuts, and durable performance. Arc curve design head allows efficient chip removal and improved perforation efficiency. How To Use: Suitable for bench drill, vertical drilling machine, and CNC carving machine. When processing hardwood or other hard materials, use water cooling to improve drilling quality and accuracy, and extend tool life. Tips: Maximum speed: 2000rpm. Use only on stationary equipment. Not suitable for handheld power tools such as hand drills or electric drills. Do not use on metal or non-ferrous metals. Ensure wood is free of nails or other metal objects before drilling. Sharpen cutting edge and tip as needed to maintain performance.