DescriptionOur 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: Brass+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 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. 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. 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.