The last two weeks I've lucked into Proto wrench purchases at estate sales.  This week's buy was four large wrenches the largest 1 5/8.  I don't have a personal need for them or a work need, but I don't often see five pound 23 inch long wrenches so I bought it.    The photo show my current larger Proto wrenches, the 1 5/8 wrench and a 1 1/4 SK wrench I also picked up.

Anything above 1-1/4 is going to collect dust.  Unless you have tractors and Cats.   But when you need a big one, you really need it!   Found a 1-1/2 incher in a camper years back  saved the day a few times.   You'll appreciate it in the future.