Marketed by M.C. Lockwood.

This tool makes the pipe coupling used by Citroën. The tool comes with a
punch and die set for the 3.5 mm pipes. Lockwood also has punch and die sets
for 4.5 (long and short). As it turned out that the 6.35 mm copper/nickel pipes
did not withstand the vibrations; MCL do not any longer supply that p&d...