Tamiya offers this tool to make R/C assembly easier than ever. Just fit any Tamiya brand 5mm adjuster into the wrench to easily screw into place with a minimum of force. Wrench allows direct vertical access to those hard-to-reach places. Wrench features classy blue anodized aluminum finish and is compatible with the following adjusters:

5mm Adjuster
5mm Adjuster 2
5mm Adjuster S