Park Tool PRS-33 FC Fixed-Height Clamp Add-On Kit for PRS-33/PRS-33.2Park Tool PRS 33 FC Fixed Height Clamp Add On Kit for PRS 33 PRS 33. 2. The PRS 33 FC adds a fixed height clamp to one side of the Park Tool PRS 33 or PRS 33. 2 Power Lift Shop Stand turning it into a double sided stand. The PRS 33 FC can be installed at any height on the PRS 33. 2 upright. Includes clamp and mounting hardware. Clamp capacity: round and aero tubes from 23 to 76 mm (7 8" to 3") wide Jaw height: 70 mm (2. 75") Replaceable jaw covers