Park Repair Stand AccessoriesClamps round, square, rectangular and aero-shaped tubes from 7/8" to 4"Adjustable clamping pressure prevents damage to thin-wall tubesQuick release pivot system allows clamping of top and bottom or left and right sides of tubeFits all PRS-2/3/4 repair stands (including OS models) and works on nearly any bike, no matter the size and shape of the frame tubeDurable, screw-type adjustment systemNarrow jaws for fitting tight access areas