Starrett KBS1018-2 Bi-Metal Unique High Speed Steel Safe-Flex Hacksaw Frame Blade, 0.025" Thick, 18 TPI, 10" Length x 1/2" Width (Pack of 2) Bi-Metal Unique Safe-Flex hacksaw frame blade Made with a patented solid-state diffusion process with 170 percent more high speed steel weld area and ground teeth For reduced blade fracture, faster cutting and longer life 18 Teeth per inch Measures 10-inches length by 1/2-inches width