Hitachi 725392 5-1/4-Inch High Speed Steel 24 TPI Jig Saw Blade, 5-Pack Has a 4-Inch working length, 5-1/4-Inch total length, 24 teeth per Inch and comes in a 5-pack Designed for fast straight cutting in metal, non-ferrous metals and aluminum 1/16 to 1/8-Inch and sandwich board 1/16 to 2-1/2-Inch Designed with optimal tooth spacing, shape and cutting angle to provide the best possible speed, cut and performance This jig saw blade is ideal for contractors, serious do-it-yourselfers, machine shops, and mechanics Comes with a 30-day limited warranty