For the professional or do-it-yourselfer, this swivel base drill bit set helps to install detachable or non-detachable swivels on wood, laminate, or synthetic stocks.It offers clean cutting, one step drilling and has a counter sink fixture and depth indicator.This set comes with a drill bit for 1/2" and 3/4" woodscrew and a drill bit for 3/4" machine screw.Type: Drill BitBlade Type: Hardened SteelBlade Length: 5" x 5" x 1"Oal: Wood/MachineSharpener Type: 2