The PCS4 has the same clamp used in Park's heavy duty shop stands and a new leg stabilizing system that creates a rocksolid base to resist tipping. Perfect for heavier duty home use or light duty shop use. Adjusts quickly from 55 to 72. Fits up to 158 diameter tubes with microadjusting clamp, and leg stabilizing system for heavy home or light shop use Leg stabilizing system for heavy home or light shop use Adjusts quickly from 55 to 72 Stand Style Folding