ITEM NAME:2pcs C3 Carbide Half Round Router Bit 1/2 3/4 -inch Router Milling Cutter Bit Description: C3 Micro-grain Tungsten Car.Shank: 8mm/ 0.315". High precision, smooth cutting, special impact resistance and good wear resistance. Build-up & Heat Resistant polytef coating. Cutting Edge Length: 1/2" (12.7mm), 3/4" (19.05mm).