New modern manufacturing technology in molding and finishing has brought about this new series of burr dry hand grinding wheels. Diamond for carbide burrs, CBN BORAZON® for hardened steel burrs. 15 face angle standard 270/325 mesh standard Other mesh sizes available 1/1/4" bore standard Hi-Tech copper resin bond 125 concentration 30% per volume copper coated diamond Made in U.S.A. Put our 40 years of experience and extensive knowledge to work for you. Call Today! Get the answers to your grinding questions. Call our Certified Abrasive Engineers. Harry G. Sachsel C.A.E.