The patented ratchet-action closure and speed release clamp of the Pro Mechanic HD repair stand is capable of managing any bike frame, up to 70lbs (32kg) working weight and tube diameter up to 2.6? (6.6cm). This replacement clamp head comes fully assembled with hinge pin and hinge pin fixing bolt. Does not include clutch cups, clutch body, or clutch body fixing bolts. NOTE: NOT to be used with shop stands, electric repair stands. Only Feedback Sports tripods. Please contact Tech Support for questions.