The Arrowmax AM-410140-BG Allen Wrench is supplied as a 4.0 x 120mm hex driver for 4.0mm hex screws on model chassis and components. With a 120mm shaft the tool improves access to recessed fixings, and the black golden finish is a cosmetic description rather than a material specification.
It is intended for routine assembly, setup and rapid adjustments, aiding jobs like chassis trimming, link and servo work. The consistent tip profile helps preserve screw heads and reduce user fatigue when performing repeated turns.
The manufacturer does not provide further information on the wrench's base material or treatment beyond the finish, so inspect the tip prior to critical work and replace the wrench if the tip shows wear to avoid rounding screws.
Carry this 4.0 x 120mm Allen wrench as part of your tool set for assembly and setup; store it well and check the tip regularly.
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