Valve Wheel Diamond fits KWIK-WAY Model SVS II, SVS, EVS, VS, VC, XC, SV, CV (7/16 inch-20 x 1-⅞ inch). High-quality diamond works excellent for dressing the valve wheel. A high-quality diamond will dress the wheel correctly for the best surface finish. This diamond assembly will also work on the Snap-On model YA 175, YA 176 and also the YA285