Hitachi 725389 5-1/4-Inch High Carbon Steel 6 TPI Wood Jig Saw Blade, 5-Pack Has a 4-Inch working length, 5-1/4-Inch total length, 6 teeth per Inch and comes in a 5-pack The ground and side set is designed for fast straight and parallel cutting on plastic, wood and particleboard 1/4-Inch to 4-Inch thick 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