This pocketable FPV propeller multi-tool from Ethix is what you need in the field for quad maintenance. Two 8mm hex sockets are combined with 2.5mm and 2mm hex drivers - the most common of all FPV drone bolt sizes.
Combining the three most common tools into one tiny handle, this multi-tool will outlast your aircraft many times over.
The two 8mm prop nut sockets are positioned on opposing ends of the tool and a one-way bearing system allows for quick and smooth prop changes. The silver side is designed for loosening and the black side is designed for tightening. Australian Stock.