... . coatingTIN, TIALN, ALTIN, TIAIN, etc.sizesstandard and non-standard.materialsolid carbide,hss,hss-coworkpiecwood,plywood,steel,aluminum,plastic,glass,stone etctool lifeLonger ... wear resistant and impact-resistant application.hardnessGood for machining up to HRC65 degree carbide taper reamer drilling and milling reamer and drill hand reamer with spiral ...