NORTON 66243528573 C8381403 3"X.035X1/4" Grinding Wheel A60-O (Price is for 25 Each/Case) Premium aluminum oxide grain for excellent cutting on carbon steel Advanced formulation for free cutting; maximizes the performance of conventional aluminum oxide abrasive Ultra thin side reinforcing for maximum cut rate and minimum kerf loss; ideal when precise thin cut is desired Reinforced for use on high-speed portable grinders Made in the USA