"C5 Bad Blade¿" 4.5" 4 tooth 1" arbor with 7/8", 5/8", and 20mm reduction rings * New Patented blade concept comes from Europe where they have been using these blades in angle grinders for years for working with wood . * Ingenious, with specially designed tooth layout, set and reinforcement which give our tungsten carbide blades their awesome cutting ability with NO Kick-Back * Rips and cuts and carves all types of woods, laminates, plastics, fiberglass and composites all with NO Kick-back * Functional and time savings by using your angle grinder for beam notching, utility cut-outs, trimming, cut-off and more with NO kick back!