[Practical Design] - Made From High Speed Steel, High Hardness, Wear Resistance And High Temperature Resistance, Durable And Excellent. On Both Sides, And Does Not Block Drills. [7 Sizes \U0026 1X Hex Key] - 7 Common Center Hinge Drill Bits Sizes 5/64 7/64 9/64, 11/64 5Mm, 13/64, 1/4 Good For Drilling Holes In Small Hinges For Cabinet, Cabinet, Furniture Makers And Other Processing Or Wood Hardware Such As Boxes Decorative. [Perfect Connection And Position] - This Hinge Center Drill Bits Are Not With Precise Positioning And Movement. Fits Like Butter And The Hole Is Smooth And Full. [Easy To Install And With Safety Stop] - Easy To Use And Install, Change Bits Quickly, Essential For Assembly And Disassembly In Use Private And Professional. [Wide Application] - With Precise Center Holes Hole Drilling Hinge Is Applicable For Door Hinge Installation For Hinges, Handles, Drawer Slides, Etc.. A Must Have For Every Home Improvement And Hobbyist Area. ,