Description: Package Includes: Hinge drill bit set comes with Self Centering Hinge Hardware Drill Bit Set 5/64", 7/64",9/64" 11/64", 5mm, 13/64", 1/4". Material: High quality steel self centering Drill Bit with high hardness, which is rustproof, solid, durable and drilling performance which is guide for centering the pilot holes needed for the hinges. Reasonable Design: Double sided hole design fast and automatic discharge sawdust from the hole on both sides, without drill blocked, which helps you save time in removing sawdust. Easy to Use and Install: Different hardness wood, need different self centering drill, you just use the hex keys take the screw apart and replace the drill with new one. Perfect carpenter tool for woodworking, wooden doors, cabinets, windows, etc. Widely Used: Applicative for furniture, kitchens, woodworking, window door etc. It can be adjusted appropriately according to the hardness of the wood. If the wood is soft, you can choose the smaller one, if the wood is hard, you can choose the corresponding one or the larger one. Size Chart: 90mmx1.9mm/3.54x0.07inch 90mmx2.7mm/3.54x0.11inch 98mmx3.5mm/3.86x0.14inch 98mmx4.3mm/3.86x0.17inch 108mmx5mm/4.25x0.20inch 109mmx5.1mm/4.29x0.20inch 112mmx6.35mm/4.41x0.25inch Package Includes: 7 Pieces Self Centering Drill Bit Set 1 Piece Wrench Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!