Features: Size: In this hinge drill bits set, there are 5/64/1.98mm, 7/64/2.78mm, 9/64/3.6mm, 11/64/4.36mm,13/64inch, 1/4inch. Material: High speed steel drill bit with electroplating; improve the protection of metal products. Self-centering Design: Bit is in a self-centering design, remove drill for easy replacement means less walking and more precise drilling. Applications: This drill bits set is ideal carpenter tool for woodworking, installing hinges on wood doors, cabinet, window, etc. Design Details: Sawdust will come out from the holes on the shell and not get the bit stuck when drilling. Specifications: Material: Steel Size:5/64/1.98mm, 7/64/2.78mm, 9/64/3.6mm, 11/64/4.36mm,13/64inch, 1/4inch Functions: Hinge drill bits includes: 1 *9pcs Hinge Drill Bits Set