Park Tool worked on plenty of designs before settling on its 100 3D Professional Micro Adjust Repair Stand Clamp, enough to decide that the clamp was deserving of the distinction as the best shop clamp they could create. Compatible with a wide range of Park Tool repair stands, the clamp's aluminum main body and durable design suit it to the demands of everyday shop use. It's also designed to be as adaptable as possible, complete with infinite micro adjustability for achieving the right grip on a range of tube sizes measuring anywhere between 23mm to 76mm, and it can safely be used with aero tubes as well. When you're working on shorter seatposts or areas with little extra space, the narrow clamping arms give you space to grip hard to reach spots, and the Cam actuated adjustment system keeps the entire system running smoothly. Anticipating routine wear and tear on a regular basis, Park Tool made the jaw covers replaceable as well, and it lists the compatible repair stands as follows: PRS 2, PRS 2 OS, PRS 2 OS 1, PRS 2 OS 2, PRS 2. 2 1, PRS 2. 2 2, PRS 3, PRS 3 OS, PRS 3 OS 1, PRS 3 OS 2, PRS 3. 2 1, PRS 3. 2 2, PRS 4, PRS 4 OS, PRS 4 OS 1, PRS 4OS 2, PRS 4W, and PRS 33.