CruzTOOLS Combo Axle Adapter for ALL BMW GS Bikes 

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Designed for BMW Motorcycles, this 10mm x 12mm x 19mm x 22mm axle adapter handles many tasks.
The 10mm fits oil drain plugs, and the 12mm end is for F850GS/A and F750GS front axle nuts. The 19mm & 22mm sizes are for front axles on the R1250G, R1200GS, F850GS, F800GS, F750GS, F700GS, and the F650-Twin.