The 1971 installs onto the clamps found on most Park Tool repair stands to more securely hold D-shaped seatposts by converting one jaw profile to a flat surface. This is useful for bikes with D-shaped seatposts and other non-traditional designs that would cause a less-than-ideal fit in traditional repair stand jaws. The 1971 is designed to fit over a clamp's existing jaw covers and is easy to remove and install by hand, making it a convenient accessory for your repair stand. Compatible with the following repair stands: - PCS-9.2 and PCS-9.3 - PCS-10.2 and PCS-10.3 - 100-3D Micro-Adjust Clamp, as found on PRS-2.2, PRS-2.3, PRS-3.2, PRS-3.3, PRS-33.2 - 100-5D Micro-Adjust Clamp, as found on PCS-4 - 100-25D Micro-Adjust Clamp, as found on PRS-25 and PRS-26

Designed for use with T-Type chains, the Eagle Transmission PowerLock provides the same rugged dependability as its predecessors. - For use with T-Type chains - No tools required for installation