Starrett Hi-Tension Hack Saw The Starrett K145 High-Tension Heavy-Duty Hacksaw Frame, Closed Grip features a professional quality high-tension hack saw frame, is easy to use with an efficient adjustment lever. Features include... It is shipped with a 12"(300mm) Starrett bi-metal unique, High Speed Steel Safe-Flex Hacksaw Blade. The handle is covered by overmolded comfortable rubber. Works with either 10" or 12" blades Specifications include... Tension (PSI): 28000 psi Tension (kgf/cm2): 2000 kgf/cm2 Blade Length (mm): 300mm Blade Length (in): 12" Throat Depth (mm): 110mm Throat Depth (in): 4.3/8"