• This stone removes the tough, hard scale left by the Electric Discharge Machining (EDM) process much faster than any of our other polishing stones.
• Contains premium-grade white aluminum oxide abrasive that fractures into sharp pieces (friable) during finishing to extend the life of the abrasive grit.
• Medium and Hard tool steels as high as Rockwell C 62.

Warning This product can expose you to chemicals including Ceramic fibers (airborne particles of respirable size), which is known to the State of California to cause cancer. For more information go to www.p65warnings.ca.gov.