The dual retractable fins of the Radial Kneeboard allow for maximum cutting power and trick potential. Contoured EVA pad with 3” padded shock strap for ultimate comfort. Any rider can get up the first time with the spring loaded Hydro hook that retracts when not in use. Constructed from roto molded PE with a foam filled shell and made in the USA. 132cm. For riders of all ages and sizes.