Lenox Hand hack saw blade has 24 TPI and is made of bi-metal used on heavy metal for prolonged durability. Bi-metal construction of the blade allows blades to bend or flex without breaking and offers shatter resistance. Blade measures 12 Inch x 1/2 Inch and features the Lenox tough tooth design that helps eliminate tooth strip page. Blade is compatible with Lenox hack saw frames and most other hack saw frames.