Unique multipurpose blade. Designed to cut through various roofing materials including stone, gravel, tar, fiberglass, metal sheeting and resin fiber. This is ideal in emergency fire and rescue operations,also demolition projects. Designed to cut dry, it is manufactured with jagged carbide segments that chop and rip through materials quickly and efficiently. Segments are attached to a stable, quiet core that travels at speeds up to 6500 rpm.