Drill America 12-Piece Tungsten Carbide Set Cutting Bit Accessory KitCarbide Burr Set include: SA1 , SA5 , SC1 , SC5 , SD1 , SD5 , SE5 , SF13 , SG5 , SH1 ,SL4 and SN2 Removes material in wood, plastic, stainless steel and metals Double cut style for rapid material removal in tough applications Solid carbide tooling provide long life and faster cutting speeds Round 1 4 in. shank allow use with a wide variety of tool holding systems Features Sub Brand Drill America CA Residents: Prop 65 Warning(s) Yes Diameter