Such an improvement over the previous pearl clamp. Whereas the one before had a habit of loosening from worn hardware due to it being a piece of metal fastened to a bracket, this one is one solid piece. No loosening no matter how battered it gets. Also, it's looks are a vast improvement. Two-fulcrum fastening clamp allows for it to hold a wider array of different diameter rods/arms, rather than a one fulcrum system, (like a crocodiles mouth). Superb craftsmanship from Pearl, this thing will last a lifetime. It's worth replacing all your old PC-50's with these when you can.