Equip your orbital floor sander with Screen-Bak Durite Q421 coarse grit screen floor sanding sheets when you want to cut more aggressively during heavy coating removal than paper or cloth sheets. Crafted with a P-grade silicon carbide abrasive, these open weave screens cut hardwoods with high efficiency and remove scale, rust and corrosion with minimal loading. Waterproof and packaged in a handy protective dispenser, these sheets can be washed for reuse and are easily stored in between.