The Lisle 5/8" Carbide Scraper, No. 81810, is designed to remove gasket residue from steel and aluminum heads and manifolds, along with carbon build up and rust. This scraper features a shorter and narrower double-dip grip handle and can be used to clean disc brake caliper slides. The tungsten carbide tip is brazed to the steel blade that is molded into the comfortable 5-1/2" long handle. The tip remains sharp and is precision ground. The company advises to use caution when using the scraper on aluminum to avoid scratching the surface.