The Lisle 5/8" and 1-1/4" Carbide Scraper Set, No. 81780, is designed to remove gasket residue from steel and aluminum heads and manifolds, along with carbon build-up and rust. This set can be used to clean disc brake caliper slides. The set feature tungsten carbide tips brazed to the steel blade that is molded into a 6" handle. The set includes two blade widths: 1-1/2" and 5/8". The tips are precision ground and designed to remain sharp.