Park Tool CSB-1 Carbon Cutting Saw Blade The Park Tool CSB-1 is a 12" tungsten steel hacksaw blade specially designed to smoothly cut carbon composite handlebars, forks, seat masts, seat posts, etc. Fits the Park Tool SAW-1 Hacksaw as well as most standard 12" hacksaws. The CSB-1 is designed for use with the Park Tool SG-8 Saw Guide. NOTE: The CSB-1 is intended only for use with carbon fiber. Use on aluminum or steel will cause premature wear to the blade. Park Tool CSB-1 Carbon Cutting Saw Blade The Park Tool CSB-1 is a 12" tungsten steel hacksaw blade specially designed to smoothly cut carbon composite handlebars, forks, seat masts, seat posts, etc. Fits the Park Tool SAW-1 Hacksaw as well as most standard 12" hacksaws. The CSB-1 is designed for use with the Park Tool SG-8 Saw Guide. NOTE: The CSB-1 is intended only for use with carbon fiber. Use on aluminum or steel will cause premature wear to the blade. TRUSTED SINCE 1963 Since our origins in the back of a bike shop in 1963, it has been Park Tool's sole mission to design and manufacture high-quality tools that empower mechanics and riders of all skill levels to service their bicycles. As with our other 500+ tools, our frame tools are a product of our decades of experience and expertise in the industry, in the shop and on the trail.