... Round Rod, Tool Bit, Carbide Tip, Ejector Pin, Punch, Mold Etc.1.machine reamer usage: Milling fitting holes with a certaindegree of ... materialsolid carbide,hss,hss-coworkpiecwood,plywood,steel,aluminum,plastic,glass,stone etctool lifeLonger tool life, super high wear resistant and impact-resistant ... carbide step reamer drilling and milling reamer and tapered hand reamer with spiral / straight flute