Brand New! Risk Racing Adjustable Motocross Starting Blocks. Features an innovative interlocking system that allows them to collapse and snap together seamlessly, this compact design makes it easy to transport and store the blocks. Provides a level and consistent launching point regardless of leg length, soil consistency, or the presence of ruts. Features high traction, non-slip tops that ensure your feet stay firmly planted during every start. Quickly adjustable to five different height levels from 1-3/4" - 7". Spring loaded adjustment hooks. Beneficial for riders of all sizes. Achieve better holeshot starts. Made from heavy duty steel. Maintain balance. One year warranty.