Widely used: 40mm high speed steel drill bit. Excellent for drilling into softwood, hardwood, veneer and uncoated particle board. Suitable for all drills and drills. Product features: high speed steel wood drill bit, diameter 40 mm, total length 90 mm, round shank. Equipped with a storage case. Clean and smooth holes: The tooth-shaped design of this high-speed steel drill bit ensures less friction and heat. It is best to remove the shavings. Cut holes clean and smooth. Easy to start: Drill center design allows precise positioning without slipping, making drilling easier. EXCELLENT PERFORMANCE:The head is designed with an arc shape, which can remove debris and provides high working efficiency. The cutting edge is sharp, the positioning is precise, the hardness is high, the precision is high, and the cutting is stable. The drill bit can drill a clean flat bottom hole without chipping. HIGH QUALITY: High quality alloy blades, hardened, tempered and carbon HSS steel structure make the blades sharper and more durable. Smoother and less noisy. The knives are painted, waterproof and anti-corrosion. WOODWORKING TOOLS: Suitable for making holes in wood. Precision grinding is suitable for mass use and easy to resharpen. They can easily enlarge existing holes and can drill any arc. VARIOUS USES:It can be used to punch products wooden, fix lenses, drawers, plastic products, wood, plywood, etc. Suitable for pistol drills, bench drills, vertical drills, hand-held electric drills, vertical electric drills and moving belt magnetic drills, etc. Best service: We want to offer our customers an excellent product and service. For your satisfaction, if you are not satisfied with the product or have any other questions, please contact us at any time.