The PCS-4 has the same clamp used in Park Tools heavy duty shop stands and the new leg stabilizing system creates a rock-solid base that resists tipping over. Perfect for heavier duty home use or light duty shop use, adjusts quickly from 55 to 72 with the lever on the main tube. Adjusts quickly from 55 to 72 with the lever on the main tube Folds flat for easy storage. Clamp allows a bike to be rotated 360 degrees and locked in any position. Clamps jaws accomodate tubes from 7/8 (22mm) to 1-5/8 (41mm) diameter. Uses our 100-5C cast aluminum, adjustable linkage clamp, the same clamp type used in our heavy duty repair stands. New leg stabilizing system that creates a rock-solid base that resists tipping. Constructed of heavy steel tubing and powder coated for a long lasting finish. Rubber feet are adjustable for uneven floors.