1.chucking reamer, special reamer 2.straight shank, taper shsnk 3.hss co, hss, solid carbide can be avalible ... advantage is following. coatingTIN, TIALN, ALTIN, TIAIN, etc.sizesstandard and non-standard.materialsolid carbide,hss,hss-coworkpiecwood,plywood,steel,aluminum ... machining up to HRC65 degree carbide step reamer drilling and milling reamer and tapered hand reamer with spiral / straight flute