Designed to Remove Gasket Residue from Steel and Aluminum Heads and Manifolds, Along with Carbon Build-Up and Even Rust. The carbide scraper features a double-dip grip handle for comfort. Can be used to clean disc brake caliper slides. The Tungsten carbide tip is brazed to the steel blade. The tip remains very sharp and is precision ground. Use caution when using scraper on aluminum to avoid scratching the surface.