As compression fitting spanners are made from drop forged steel, they require very little maintenance due to the toughness of this material.
If the tool does not have a black oxide coating, then it may be prone to corrosion, so it’s important to keep it stored indoors and dry it if needs be.
How to spot a top quality compression fitting spanner
Compression fitting spanners can be marked or come with information referring to their DIN standard. DIN is an abbreviation for Deutsche Industrie Norm, otherwise known as the ‘German industrial standard’.
The DIN gives a set of standards to all industrial goods covering size, tolerances, hardness and finishes.
The standard DIN895 is specific to spanners and wrenches. If your compression fitting spanner is marked with DIN895 it means that it complies with all of their standards and is probably of top quality.