Our hinge bit set is perfect for pre-drilling hinges for screws. Great for interior and exterior doors. Commonly to as a vix bit the spring loaded guide centers the built-in drill bit inside the holes of a door hinge, cabinet hinge, bracket, or other that requires a centered hole. Feature - ColorSilver - Material: high-speed steel - Dimensions: 5/64’’, 7/64’’,9/64’’,11/64’’ - It’s stable and is very durable. It also comes with 4 sizes to fit your drill and your likings - Made of with a brass body, easy to use and install, change bits fast with one-handed load and release - Drill for precise positioning, will not shift - Get accurately centered holes for hinges, handles, drawer slides, etc. Applicable for the installation of the door hinge. 4 common sizes used for carpenters, cabinet, furniture makers and other wood working trades. - The 7/64" is good for drilling holes in smaller hinges and like decorative boxes. /64" is for medium to full size hinges and hardware. The 11/64 is perfect for door hinges, gate locks and all large hardware. Package list: 4 Pcs x Hinge Drill Bits