I hope this is the right place for this. I acquired this huge wrench, 54" long 4 1/8" 6 point hole, it came from an old Gulf Distributor bulk plant. I have searched the internet and cannot find anything, I do not know what it is used for. I told my coffee drinking buddies it was a "Texas
Spark Plug Wrench". It also has what looks like P 72 and a Win a circle. Anybody know what it is and what it waqs used for? Thanks from a Newbie.

Used to open valves on above ground storage tanks so tankers could unload product.

Thanks Frank. That makes sense, I was told that at one time the bulk plant got their product from railroad tank cars. The old railroad track was directly behind the bulk plant. Later, all the product was delivered by truck. Thanks again for the info, I figured someone on here would know .Steve