Dremel Ultra-Saw Masonry Cutting Wheel 3-1 *Sub Brand: Ultra-Saw *Product Type: Masonry Cutting Wheel *Diameter: 3-1/2 in. *Thickness: .094 in. thick *Abrasive Material: Silicon Carbide *Grit: 30 Grit *Maximum Speed: 20,000 rpm *Compatibility: RotoZip and ZipMate *Abrasive material for high performance masonry cutting applications *Cuts a wide range of masonry materials including stone, slate, cement board, bricks, concrete, cement backer board and more