Hitachi 725397 4-Inch 6 TPI Jig Saw Blades For Fiber Cement Siding - 3 Pack Jigsaw blade designed for fast, coarse cutting of abrasive materials Ideal for use on fiberglass-reinforced plastic, cement bonded particle board and fiber cement Carbide-tipped for durability and cutting strength 4-inches long with 6-teeth per inch on cutting side Comes with a 5-year limited warranty Jigsaw blade designed for fast, coarse cutting of abrasive materials Ideal for use on fiberglass-reinforced plastic, cement bonded particle board, and fiber cement Carbide-tipped for durability and cutting strength 4-inch length; 6 teeth per inch on cutting side 5-year limited warranty; 3-pack