Twist Dynamics Double & Triple Adjustable Shocks undergo a three-step sealing system for leak-proof performance. Each shock is serialized and individually dyno tested to meet a specific performance curve validation before packaging. Constructed with deflective disc valving on a precision machined aluminum piston with a low-friction PTFE piston band for quick response and long wear. Body machined from high-strength billet aluminum. 5/8″ center-less ground hard chrome plated piston rod. 18 clicks of simultaneous compression/ rebound adjustment on double adjustable shocks, independent compression and rebound adjustment on triple adjustable shocks. Up to 2″ of ride adjustment with the coil-over spring system. Springs are made in the U.S. using high tensile, chrome silicon steel for high travel. High tensile steel required fewer coils for a lighter weight spring. Heat treated and shot-peened for long life. 2 % free height lifetime guarantee.