IRWIN® Bi-Metal Hacksaw Blades are safer than HSS blades. They are flexible, shatter resistant and are suitable for use on a variety of metals.Select Option 18tpi Pack 224tpi Pack 100300mm (12in) X 24tpi, Pack of 2300mm (12in) x 18tpi, Pack of 100300mm (12in) x 32 TPI (Pack 100)300mm (12in) x 32tpi, Pack of 2 Add to Basket Quantity