Park Tool Home Mechanic Repair Stand - PCS-9 Screw type clamp adjusts to fit tubes of various shapes from 7/8" to 3" (24mm to 76mm) Clamp rotates 360 degrees for easy access to any part of bike. Will also clamp on aero shaped seat posts Folds to 41" (104cm) for portability and storage Screw type clamp adjusts to fit tubes from 7/8 to 3" Clamp rotates 360 degrees for easy access to any part of bike