SKIL 94102 6-Inch "Ugly" Bi-Metal Reciprocating Saw Blade Plunge tooth for easy and fast plunge cuts Bi-metal progressive tooth design for fast cuts and long life in a variety of materials Patented progressive tooth design for cutting thin and thick material with a single blade Plunge tooth for easy and fast plunge cuts Patented progressive tooth design for cutting thin and thick material with a single blade