Help identifying wrench

[redrums]

Is there anyone out there that could tell me what kind of wrench I have here?  I have heard many different things, and thought I would be better off going to the people that deal with wrenches on a regular basis.

I can make out an "M" close to the hole, followed by what could be a 5, then a possible /, then either a 3 or an 8. 

[Papaw]

Welcome to Tool Talk! Find the introduction forum and introduce yourself!

You have an M58 wrench. Quite common and was made by several manufacturers.

Google "M58 wrench", you'll find lots of references.