There's a new thumb notch in the cam top to simplify full cam retraction, and a new molded handgrip for maximum comfort on those long pulls. The cams in CMI Ultrascenders are 4140 chrome-moly steel. This high strength material imparts a new, patented, non-metallic finish to the cams. The new finish gives the cams the same corrosion resistance as stainless steel yet increases both the tensile and yield strength. Additionally, the new finish is harder than the best knife blades or files which allows us to guarantee our cams against wear out for life! Team these new features with the extruded and machined bodies, stainless steel springs and operating parts, and you've got one of the best ascenders available!