Thinner kerf provides faster and cleaner cuts. Silicon coating eliminates pitch and resin build-up for longer life. C2 carbide tipped teeth stand up to pressure-treated lumber longer. Unique shoulder design puts more support behind each tooth for smoother, more exact cuts. Specially engineered heat vents eliminate blade warping. 7-1/4", 24T, 5/8" arbor with 13/16" diamond knockout.