Carbide tipped Irwin Marathon Circular Saw blade NIP. 7" - 71/4" 24 tooth, 8,300RPM max. unique blade shoulder for a more uniform, cleaner, smoother cut. heat vents eliminate blade warping. thin kerf edge for faster, smother, quieter, more accurate cuts. hardened plate. we ship to USA ONLY. ask questions. thank you for looking and buying.