No bristle scrubber. Specialized Scotch-Brite material. Strong handle for good leverage. No. 7721: Coarse scrubber for grills, rust, old paint, cement floors, boat bottoms, and wax build-up No. 7722: Medium scrubber for floors, cleans black heel marks, wax build-up, vinyl and vinyl asbestos floors, linoleum, slate and ceramic tile No. 7723: Fine scrubber for bathroom and kitchen, cleans fiberglass, ceramic, vinyl, stainless steel, dirty hands, walls, and counter tops