2 Pack 4-1/2" Replacement Disc for Paint & Rust Remover, Stripper They are used for cleaning rust and pain, coatings, welding blue, adhesives, and epoxy on any worked surface. Ideal for removing and polishing and all kinds of surface conditions. No harm to the work piece, even works in wet areas. No harm to the work piece, even works in wet areas. 4-1/2" Diameter with 7/8" Arbor fits Paint Remover and Angle Grinder