The XCAVATOR has the highest removal rate of anym of Walter's grinding wheels and is compatible with all metals (steel, stainless, cast iron, hard alloyed steel, etc.). When the number one priority is high removal, XCAVATOR is the wheel of choice. Confronted with some of the toughest metals in the industry, from tungsten carbide to quenched and tempered steel, the XCAVATOR demonstrated time and time again its capacity for ultra high removal. You will feel the bite of this wheel on every type of metal!