This lownoise saw blade is designed for demolition and rescue applications Tight tolerance and longer lifetime are only a few features this tool offers In addition this blade features a heavyduty plate 4648 Rockwell in hardness special carbide tipped cutting edges for great performance antivibration design and expansion slots to reduce noiseThis tool is also produced by following precise procedures and techniques to confer greater value and allow for higher performance trimetal brazing balancing and tensioning ring and lasercutting for the steel plate Blade includes 78Inch and 20mm reduction rings Try out the quality of the CMT blades