ITEM NAME:2pcs 8mm Shank Half Round Bearing Bullnose Router Bit Set Carbide Tipped Round Description: C3 Micro-grain Tungsten Car.Shank: 8mm/ 0.315". Solid Hardened Steel Bodies with Anti-Kickback Design. High precision, smooth cutting, special impact resistance and good wear resistance. Build-up & Heat Resistant polytef coating.