BIT SPECIFICATION Bit Type 8-1/2� GMC1306 Blade 6 Cutter Size (mm) Φ13MM Cutter Qty Φ13�30 Gauge Length (mm) 50 Connection 8-4 N.W./G.W. (KG) 36/40 GREAT PDC bit Advantage  Equipped for Performance Great PDC Bits are equipped with 1.High Abrasion tungsten carbide material, Hardened Alloy Steel base material 2.High performance PDC-Cutters 3.Carbide and Diamond gauge protection 4.Carbide/Diamond Shock Studs 5.Threaded or Plain Carbide Nozzles for Flushing