Designed To Remove Gasket Residue from Steel and Aluminum Heads and Manifolds, Along with Carbon Build-Up and Even Rust. Can be used to clean disc brake caliper slides. Tungsten carbide tips are brazed to the steel blade that is molded into the comfortable 6" long handle. Two blade widths, 1-1/4" and 5/8" to work on many applications. Tips remain very sharp and are precision ground. Use caution when using scraper on aluminum to avoid scratching the surface.