Packaged in a sturdy, easy-to-use dispenser that eliminates waste and allows for simple, clean storage, these Screen-Bak Durite Q421 fine grit screen floor sanding sheets are ideal for hardwood floor preparation or between-coat use as they cut more aggressively than paper or cloth. The open weave screen resists loading when removing scale, rust, and corrosion, and the P-graded silicon carbide provides excellent cutting, making these waterproof and washable screen floor sanding sheets ideal for use on your orbital floor sander.