This premium 4” aluminum oxide high speed grinding stone is used for flat smoothing the cut edges of all types of metals as well as granite, marble, travertine, quartz, and quartzite. These grinding stones are designed to be used with 4 ½” angle grinders and have a standard 5/8” 11T threaded insert embedded in the stone for attachment.

Available grit sizes are from 24 to 120. Proudly made in the USA