Precision ground, super-efficient bi-metal blade for a faster and lasts longer on tough materials. The high-speed steel cutting edge welded to a tough alloy steel back provides optimum tool life together with a high resistance to breakage. Blade cross section 13 x 0.65 mm (1/2 x 0.025 Inch). Blade length: 300mm (12 Inch)Size 300mm (12 in) x 32 tpi.Pack: 50 Bi-Metal Unique Safe-Flex Hacksaw Blades 300mm (12in) x 32tpi Box 50