Review on Faucet and Sink Installer: Wrench for Plumbing Repair and Installation - Toilet Bowl, Sink, Bathroom, Kitchen and More by Elvis Kohl

The space behind my sink was just over 2 inches wide. I felt wing nuts on the umbilicals. I broke one off with my fingertips but found that once I took it off I couldn't put it back on. I ordered this key because it has slots. The first nut is back to normal. I could barely start one with my fingers. In less than one movement I would have met resistance. I didn't dare to apply a lot of torque with such a small thread. Before using the wrench, I turned it so both wings of the nut were in the grooves. With the nut in the wrench and the lead in the middle of the handle, I knew the nut didn't have transverse threads. The wrench felt better than my fingertips. By repeatedly tightening and pulling back, I set the end of the lead. I think it was these keys that made it possible to design a sink in such a small space.