Features: brand new and high quality ●Professional drill bits are suitable for installing door hinges. ●The hinges are screw holes for door and window hinges, which are accurately positioned and will not shift. The sawdust drilled on the top edges on both sides is automatically discharged without jamming. ●Can effectively improve drilling efficiency! The product design is exquisite and functional. It is an indispensable tool for the industry and DIY. ●The spring-loaded guide aligns the built-in drill bit to the hole of the door hinge, cabinet hinge, bracket, or hardware that requires a center hole. ●The drill bit is made of high-speed steel, which is harder, and the for head has a three-point design, which will not slip. Specifications: Material:High Speed Steel Color ：Black Size: Approx.98x23x6.35mm/3.85x0.90x0.25inch Diameter 1: 5mm/0.19inch Diameter 2: 1/4inch Package Includes: 1PcxHinge Drill note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.