Rocks, dirt and debris striking your shock shafts lead to dents, dings and burrs, which, in turn, lead to torn shock seals. Torn shock seals means leaky shocks and poor shock performance. RPM Shock Shaft Guards shield the shock shaft from those deteriorating elements, prolonging the life of the shock shaft, which improves the long-term performance of the suspension and in turn, prolongs the time between seal replacement and shock rebuilds.