Wood drill sizes: φ15mm / 20mm / 25mm / 30mm / 35mm / 40mm / 45mm / 50mm / 55mm / 60mm. These wood drills can drill large and small holes, the maximum hole depth is 50mm. Precise drilling: The wood drill has an oriental tip, 2 main cutting edges and 2 closed peripheral cutting edges. Because the wood drill bits are sharp, opening is very precise, easy and clean, without broken edges. Works for a variety of materials: The wood drill bit made of alloys and carbon steel can drill into materials such as hardboard, wood and plywood, fitting the spherical tip of an old door, drawer, etc. The woodworking router bit can drill overlapping, angled and pocket holes in all types of wood, easily drill hinge holes, cylinder holes, threaded holes of computer desks and cabinet fasteners. Compatible: The wood drill bit is suitable for drilling machines, pistol drills, drilling machines, vertical drilling machines, electric hand drills, motorized base drilling machines and mobile magnetic tape drilling