Synthetic, non-metallic alternative to steel wool is long lasting and won’t rust or shed fibers. Use on wood, plastic, or metal to produce a desired finish, or to clean away rust, carbon, dirt, or crud deposits. Lasts longer than steel wool—when the fibers get clogged with debris, just wash the pad with cold water, air dry, and it’s ready to reuse on other projects. Safe for use with cleaning and stripping solvents. Coarse is for fast rust removal and smoothing rough wood; Fine is for metal and wood surface finishing.