The Lisle Corporation 5/8" Carbide 8" Scraper, No. 81960, is designed to remove gasket residue from steel and aluminum heads and manifolds, along with carbon build-up and rust. It features a narrow double dip grip handle and a Tungsten carbide tip that is precision ground and brazed to the steel blade. The tool can also be used to clean disc brake caliper slides. When using on aluminum, the company recommends to use caution to avoid scratching the surface.