Features: Designed for portable floor polishing machines to restore and (http://maplered.com) maintain Marble (http://www.lightemprador.com) orGranite (http://tanbrown.org) fllors.Snail-Lock ( left, right) and (http://maplered.com) Velcro backed.Grit 50#, 100#, 200#, 400#, 800#, 1500#, 3000#, Buff