This chain wrench works exactly as it should and BETTER. It takes all the materials I've tried it on, including smooth PVC. The handle is strong and comfortable to hold, and the ring at the end of the chain makes it easy to adjust to the length you want. First I tried to reduce the diameter of the chain to the smallest diameter possible before tightening the load. IT IS NOT NECESSARY. Just adjust the chain to a comfortable length to complete the circle and it will grip nicely. Although there is no built in ratchet, this wrench WILL ratchet thanks to the clever design of the chain end of the handle. I am very satisfied with this key and will order another one immediately.