I bought two of these. I am a stainless pipefitter. They work descent for alligning pipe. However, they dont really provide enough clamping power to hold two peices together that are anything longer than two elbows or two ferruls. If you really tighten these down they just oblong the fit up. I would rather make a pair of jeds but I thought I would at least try these. These would be a good backup tool to have at your home garage but they dont stand the test with me at work everyday.
ProsUnlocking mechanism is nice.
ConsDoesnt hold long peices together well and its made in china.