Use only one hand to adjust the height or unscrew your clip! The anti-rotation feature means never holding the lower shaft to prevent loosening from the base. Oversized threading means it takes only seconds to assemble or disassemble this stand! Just turn the shaft clockwise to lock, and simply step on the foot pedal and turn counterclockwise to release. Includes a ProGrip clutch for one-handed quick and easy height adjustments.