Hoist RS-2700 Chin/Dip Assist (Roc-It Selectorized)Dynamic adjustment is the essence behind the ROC IT line from HOIST. Using ROX technology, the user becomes an integral part of the exercise by continuously adjusting the position of the user with the movement of the exercise arm. As a result, the ROC IT line embodies a unique training experience that achieves the unrestricted joint movement and core activating benefits of functional training coupled with the stabilizing benefits of machine based