This set of three quick-change hinge bits are part of Snappys 1/4" hex drive bit and accessory line that lets you quickly and easily change from one bit to the next. Set includes 5/64", 7/64", and 9/64" spring-loaded self-centering bits for #2 - #4, #6, and #8 - #10 screws. The bits will perfectly align your screw holes with the holes in your hinges, drawer slides or other similar hardware.