Widely Used: 40mm HSS drill bit. Excellent for drilling into softwood, hardwood, veneer, and uncoated particleboard. Suitable for all drills and power drills. Product Features: HSS wood drill bit, 40mm diameter, 90mm total length, round shank. Equipped with a storage case. Clean and Smooth Holes: The tooth-shaped design of this HSS drill bit ensures less friction and heat. It is better for chip removal. Cut clean and smooth holes. Easy to start: The drill bit center design allows for precise positioning without slipping, making drilling easier. EXCELLENT PERFORMANCE: The head is designed with an arc shape, which helps remove debris and provides high work efficiency. The cutting edge is sharp, the positioning is accurate, the hardness is high, the precision is high, and the cutting is stable. The drill bit can drill a clean flat-bottomed hole without chipping. HIGH QUALITY: High-quality alloy blades, hardened, tempered, and carbon HSS steel structure make the blades sharper and more