Premium high speed steel inlayed knife, mounted on a 1/4″ wall 3″ x 4″ structural tube.  Twelve fastening bolts throughout length of the knife designed to ensure optimum rigidity & trueness between knife and beam.  Machined and ground to .0015″ tolerance (not shimmed) with a universal blade mount to fit all curling ice scraper brands, at a total length of 64 inches.