Rockwell, 3-1/8", Sonicrafter, High Speed Steel Saw Blade, With Universal Fit System, 3-1/8" High Speed Steel Saw Blade, Use To Make Linear & Plunge Cuts, Cuts Thin Wood, Plastic, Fiberglass, Non-Ferrous Metals, Thin Sheet Metal, Hardened Fillers, & Window Glazing, Universal Fit System Adapts To Other Brands.