Ulisem Set of 4 HSS self-centering drill bits for hinges, designed for carpenters, cabinetmakers and furniture makers.

Precision Self-Centering Drill Bit: Self-centering precision drill bits are essential for pilot holes in hinges, handles, drawer slides, and other parts. The cone surrounding the drill bit ensures the pilot hole is centered relative to the countersunk hole. Drilling a Sharp Pilot Hole: The 135-degree angled edge of the drill bit head allows for faster drilling into the hinge hole position. The guide surrounding the drill bit is spring-loaded to keep it in contact with the countersunk hole of the part being repaired. Automatic Chip Removal: Sawdust is automatically discharged from both sides of the holes, preventing the drill bit from jamming. You don't need to remove wood chips, thus efficiently increasing your workload. Easy to Use and Install: Different wood hardnesses require different centering drill bits; simply remove the screw and replace the drill bit. Professional video tutorials on usage will be provided. Product Description Size: 4pcs self-centering Who is it designed for? DIY enthusiasts - Professionals or hobbyists such as carpenters, mechanics, cabinetmakers, furniture makers, and other woodworking craftspeople. - These self-centering pre-drilling points are ideal for pre-drilling holes for fasteners, including hinges, where perfectly centered pre-drilling is essential. - The 4 points are different sizes to fit all models, from the largest to the smallest. Unique Value: 1. Provide professional video usage tutorials; please contact us. 2. Long-term durability: Brass shell, high-speed steel drill bit, electroplated finish, 14-month warranty. Superior drilling performance: precise positioning, won't move, chips will automatically discharge from the hole on each side of the drill's top, preventing wood chip clogging. Instructions: Common Size: The most common hinge screw sizes are 5/64, 7/64, 9/64, 11/64. 5/64: Hole diameter is approximately 2 mm, use approximately 2.2-2.8 mm sheet metal screws. 7/64: Hole diameter is approximately 2.8 mm, use approximately 3-3.5 mm sheet metal screws. 9/64: Hole diameter is approximately 3.5 mm, use approximately 4-4.5 mm sheet metal screws. 11/64: Hole diameter is approximately 4.5 mm, use approximately 5-5.5 mm sheet metal screws. Package includes: 4pcs Drill Bits Hinge Note: Please adjust the settings according to the hardness of the wood when opening. If the wood is soft, you can choose a smaller size; if the wood is hard, choose a corresponding or larger size. Sold by the Laoya store.