Sharp steel blade quickly peels off carbon, sludge. Sharp, hardened steel blades remove carbon, old gasket material, adhesives, sludge and other hard-to-clean substances from blocks, heads, etc. Comes with three blades. 1, 1 1/2 and 2 widths. Tool will hold single edge razor blade for bumper stickers and decals. Weight: 0.85 Lb.