This Diamabrush coating removal tool is built with 10 special 25 grit diamond coated sanding blades that removes coating (like mastic, adhesives, thin-sets, and thin epoxies like paint & urethane) from concrete floors. The tool spins counter clockwise so it can be used on floor buffers and is 16 inch to fit on standard 17 inch floor buffers. The disk does not require expensive heavy-duty machines to use.