THE JEDREK 4-INCH NYLON BRUSH (FREQUENTLY SUPPLIED AS AN ABRASIVE CUP OR WHEEL BRUSH) IS A HEAVY-DUTY ROTARY ATTACHMENT FEATURING ABRASIVE-INFUSED NYLON BRISTLES. IT IS COMMONLY USED FOR STRIPPING PAINT, REMOVING RUST, AND POLISHING WOOD OR METAL WITHOUT CAUSING SPARKS OR DEEP GOUGES