... holes with a certaindegree of accuracy in machine tools. Semi-finishing and finishing the holes, Also used for the preworking of grinding. 2. The reamer ... , TIALN, ALTIN, TIAIN, etc.sizesstandard and non-standard.materialsolid carbide,hss,hss-coworkpiecwood,plywood,steel,aluminum,plastic,glass,stone etctool lifeLonger tool ...