Microcrystalline grinding wheel 250mm x 45mm for wet grinders such as Tormek. This wheel is much harder and longer lasting than the soft wheels normally supplied with wet grinders and will stand up to sharpening HSS woodturning gouges. Perfect for sharpening all steel and HSS tools especially woodturning tools. Fine 180 grit for a superfine edge. Please specify bore size (usually 12mm for Tormek).