These 3-way adjustable drag shocks are designed to allow the racer to dial-in the race car to meet changing track conditions. Fronts are adjustable in ratios of 90/10, 80/20 and 60/40. Rears in ratios of 70/30, 60/40 and 50/50. Setting the shocks are as simple as compre s s i n g the shock, then twist and click. These shocks are designed for Drag Race use only! Not for street use.