Park Tool Spoke Key SW-12C - for Mavic

Comfortable, vinyl dipped, double-ended spoke wrench for select Mavic® wheels using the integrated M7 nipples. Smaller end fits 7-spline nipples with a 6.4mm outside spline diameter. These are found on the R-sys wheels.
The larger end fits the 6-splines of the 9mm OD of the threaded eyelets of the "FORE drilled rim adapters" found on rims such as the Mavic® XM819, EX823 and Speedcity wheels.
(This is equal to the sizing of the Mavic "108 471 01" wrench.)