1, Conventional Abrasives Stone Sets; 2, H70, H50 Honing Stone Sets 3, Fit for Sunnen HT/HL/STH Honing machines. We ... provide both conventional abrasives honing stones sets as well as metal bonded Diamond and CBN stone sets. They are completely interchangeable with the ... tools, K, L, BL, P28, P20, R28, H70, H50, GHSS and other honing tools. Call or email us your requirement today!