Trusted by firefighters and swat teams worldwide, this diamond blade is used as an emergency rescue and tactical entry tool. Diamond side coating prevents stress build up and allows the side of the blade to be used for grinding. Made with GE Superabrasive diamond and Excellent for cutting through pre-stressed concrete, ferrous and non-ferrous metals including sheet metal, pipe, metal plate, steel bar, angle iron, ductile iron, rebar, rod, iron bars, ductile pipe, cast iron, HDPE and PVC plastic pipe, metal roof, and drywall studs, masonry, plastics and wood. Lasts 100X longer than abrasive wheels and produces a constant, even cutting depth. Save time by using one blade without having to constantly put on a new disc. Traditional abrasive discs wear down and shrink which can be dangerous. This diamond blade maintains a constant cutting depth throughout the life of the blade. Size: 12" X .125 X 1"-20MM Bushing | Fits on most Cut-off Machines, Hand-Held Power Saws, Concrete Saws and Masonry Saws. The core is made from heat-treated hi-speed steel and is guaranteed to withstand the demands of dry cutting. The maximum safe operating speed is 6,300 RPM. LIFETIME WARRANTY & FREE RETURN SHIPPING - All Delta Diamond Products, Inc Diamond Blades, Coring Bits, Hole Saws and Grinding Wheels include a lifetime warranty against warping, cracking and material defects. If any diamond tool (being used under its intended use with at least 50% wear left) fails to cut or work properly, or if the bond between the diamond segment and the steel core becomes separated at any time, the diamond tool will be replaced free of charge.