【7 DIFFERENT SIZES】: The hinge drill bit comes with 7 most common hinge screw sizes: 2mm, 2.8mm, 3.5mm, 4.5mm, 5mm, 5.2mm, 6.35mm, ideal for drilling holes in small hinges for carpenter, cabinet, cabinet maker and other woodwork, or decorative hardware of boxes. 【HIGH QUALITY MATERIAL】: High speed steel drill bit with a brass body designed; High hardness, rust resistance, solidity, durability and superior drilling performance that serve as a guide for centering the pilot holes required for hinges. 【PRECISE POSITIONING】: The pilot hole drill bits are precisely positioned and are not offset. The drill guide can be well fixed to ensure the accuracy of punching. Sawdust will automatically flow out of the holes on both sides of the drill bit without jamming the drill. This increases the safety of using the product. 【EASY USE AND INSTALLATION】: Different hardness wood, requiring different centering drill, you just need to disassemble the screw and replace the drill with a new one. Perfect