【High Quality Material】: HSS drill bit with brass body; high hardness, anti-rust, strength, durability and excellent drilling performance. It can be used as a guide for the centering guide hole required by the hinge. 【Precise Positioning】: The positioning drill is precisely located without deviation. The drill sleeve is attached to ensure accurate drilling. Wood chips automatically flow through the holes on both sides of the drill, preventing jamming and increasing safety during use. 【Easy to Use and Install】: For different wood hardness, simply remove the screws and replace with appropriate drill bits. This set is an ideal tool for woodworking tasks such as installing hinges on wooden doors, cabinets, and windows. The design allows wood chips to exit through the side holes, preventing blockage and reducing the need for manual chip removal, improving efficiency. Model: 8-piece set + key Weight: 266 grams Size: 86x6, 88x6, 96x6 (2 pcs), 98x6, 108x6, 109x6, 112x6 Blade Length: 110 mm Total Length: 150 mm Blade Diameter: 2.5 mm Shank Diameter: 1/4 inch Shaft Material: Carbon Steel Category: Wood Hinge Drilling Package Contents: 8 hinge drill bits + 1 key