Wood Drill Bit Sizes: 15mm / 20mm / 25mm / 30mm / 35mm / 40mm / 45mm / 50mm / 55mm / 60mm. These wood bits can be used to drill large and small holes, maximum hole depth being 50mm. Drill Precisely: The wood drill bit has an oriental point, 2 main cutting edges and 2 closed peripheral cutting edges. the wood drills being sharp, made the opening very precise, easy, and clean, no broken edges. Works for Number of Materials: The wood drill bit made of alloys and carbon steel, can drill on materials like hard plate, wood and plywood, mounting the spherical tip of the old door, drawer etc. The woodworking milling cutter can drill overlapping, angled and pocket holes in all types of wood, easy to drill hinge hole, cylinder hole, thread hole of computer desk and cabinet fixture . Compatible: The wood drill bit is suitable for drill press, pistol drill, drill press, vertical drill, electric hand drill, motorized base drill and movable band magnet drill. Convenient Storage: Each wood drill bit remains in a plastic bag with oil, avoiding corrosion, and the plastic case to prevent the drill bit from colliding causing them to be damaged or dull.