A 4 way key might fit.
https://www.amazon.com/Pasco-1701-4-Way-Sillcock-Key/dp/B00467FABM/ref=asc_df_B00467FABM?tag=bngsmtphsnus-20&linkCode=df0&hvadid=80333185695375&hvnetw=s&hvqmt=e&hvbmt=be&hvdev=m&hvlocint=&hvlocphy=&hvtargid=pla-4583932713270420&psc=1#immersive-view_1684798134933