You made the cut in stone or brick and the edge is too sharp to handle safely or too rough to fit properly against adjacent material — a grinder leaves gouge marks that show through mortar, and a chisel alone doesn't flatten the way you need. Rubbing bricks are what stone workers and masons use to hand-finish cuts that need to look clean and fit tight. Silicon carbide fluted rubbing brick — silicon carbide cuts faster than aluminum oxide on hard stone and brick, and the fluted face provides more aggressive stock removal than a plain-faced brick. The flutes self-clear swarf better than a solid surface, keeping the cutting face fresh through extended use. Sized for hand-held use without a tool. Standard in the hand tools of stone workers and masons across northeast Nebraska and northwes Stocked at Crofton Lumber and Akron Lumber.