Pipe wrench
The pipe wrench is similar to an eye wrench except for the difference in its footprint

Pipe wrench

The piping key is similar to an eye key other than the difference in its fingerprint: it is a 6 or 12 pan key (according to the dimension the bolt to loosen) allowing to bury the piping to cover the 6-pan connection. This type of key is particularly recommended in the automotive environment to loose pipe fittings with olive such as braking, power steering, hydraulic connections, etc.

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