The little yet tough steering obstructs are molded from a specific composite combination for maximum energy. Ideal for high-traction conditions. Generates less on-power steering, safer to drive. Composite steering block inserts permit very quickly & effortless reduced roll center modification. Roll center is efficiently achieved with additional shims and extra inserts. For optimum drivetrain reliability, bigger 5x12 ball-bearings with additional powerful load lets you the surface spot. In inside location, smaller 5x10 ball-bearings may be used for minimized unsprung fat. Available in various hardness substances.