Shank: 1/8"Cutter Size: 9/32" Diameter X 13/32" TallSilicon Carbide Grinding Stones Are Designed To Grind And Etch Stone, Glass, Ceramics, Porcelain And Non-Ferrous MetalsIdeal For Sharpening, De-Burring And General Purpose Grinding On Harder Materials Including Stone, Glass, Ceramic, Porcelain, Gemstones And Non-Ferrous Metals Specially Designed For Working With Conic And Flat Surfaces