IVY Classic 36173 Ripcross 4-1/2-Inch 36 Tooth Thin Kerf Carbide Circular Saw Blade with 20mm, 3/8-inch Arbor, 1/Card Designed for smooth, efficient ripping and crosscutting in plywood, composition board and hard/soft woods, Ripcross (Registered Trademark) Thin kerf blade reduces drag and friction with anti-kickback design ensuring consistent chip removal Alternate top bevel ground C3 modified tungsten carbide teeth Fully hardened blade with a Rockwell Hardness of 40-43 Arbor: 20mm, 3/8-inch, Kerf: 0.063-inch, Hook: 20-degree