Oh, you're showing off, Bird! What a neat collection...um, gathering...of wrenches.
The J575 one looks more like a component of a machine than a wrench to me - I picture it pivoting on the hole in the middle, and pulled/pushed by the hole in the end, with the slot operating on some pin in the machine.
The flat wrench just above it was probably a throwaway wrench sold with something for use during the installation of the something. But maybe not; I'm wrong at least once a day (my wife would argue this is wild optimism on my part), and maybe this is today's occasion.
Can't help otherwise.
