Description Our hinge bit set is perfect for pre-drilling hinges for screws. Great for interior and exterior doors. Commonly refered 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 pilot hole. Feature - Color: As shown- Material: high-speed steel- Dimensions: 5/64'', 7/64'',9/64''，11/64'' 5mm, 13/64"1/4"- It's stable and is very durable. It also comes with 7 sizes to fit your drill and your likings- Made of high steel with a brass body, easy to use and install, change bits fast with one-handed load and release- Drill bush for precise positioning, will not shift- Get accurately centered holes for hinges, handles, drawer slides, etc. Applicable for the installation of the door hinge. 7 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. The 9/64" is for medium to full size hinges and hardware. The 11/64 is perfect for door hinges, gate locks and all large hardware.Packing list: 7 Pcs x Hinge Drill Bits