Bit diameter: 1/8 - 1/2 in by 1/32 in incrementsShank diameter: 1/4 inNumber of flutes: 2EachBit diameter: 1/8 - 1/2 in by 1/32 in incrementsShank diameter: 1/4 inNumber of flutes: 2VARI-BIT® HSS VB-1 Step Drill Bit, 3 in (OAL), 1/8 - 1/2 in By 1/32 inhttp://s7d5.scene7.com/is/image/Staples/s0481884_sc7?$std$http://s7d5.scene7.com/is/image/Staples/s0481884_sc7?$thb$http://s7d5.scene7.com/is/image/Staples/s0481884/VARI-BIT-HSS-VB-1-Step-Drill-Bit-3-in-OAL-1/product_763269VARI-BIT® HSS VB-1 Step Drill Bit, 3 in (OAL), 1/8 - 1/2 in By 1/32 in0.00