Product Description: 5 PCS bit including full size: 30mm, 40mm, 45mm, 50mm, 60mm. Material: Made of carbide The stick: 9.5mm The drill bit : 30mm/40mm/45mm/50mm/60mm. Maximum hole thickness: 60mm Total length: 85mm Cemented Carbide: Constructed with cemented carbide for long lasting durability, the high speed steel drill bit drills overlapping, angled and pocket holes in all types of wood, easy to drill hinge hole and cabinet fixing. X-wing Design For Precision: The center spur of each bit ensures precise drilling and prevents walking and wobbling during operation, creating perfectly round and precise holes with the design of the center spur. Cutter Kit: drill bit dimension at 30mm / 40mm / 45mm / 50mm / 60mm, it can be used to drill large and small hole, maximum hole depth is 50mm, small resistance to incision, improve opening speed, easy chip and no shaking. Professional Tool Sets: Guided by the circular rim, bore all arcs in any direction; ensures a true, precise and clean flat-bottomed hole with the rapid elimination of waste and which ensures your work with efficiency. Drilling Cutting Holes: Suitable for drill press, gun drill, drill press and moving tape magnetism drill for mounting ball point of door, drawer; perforation on wood products, wood and plywood.