I go tired of busting my knuckles using 3 screwdrivers to get these spanner nut style fasteners loose. I was going to make on for my wheel tonight but noticed I needed two different sizes.My solution:weld two nubs to an adjustable wrench. Now just adjust it to whatever size you need at that time.
HA! NO kidding.I was hoping they would go unnoticed. Yeah,definitely not pretty welds.It took a lot of heat to penetrate that wrench. Hey man,its hard to weld in a 3/16'' dia circle when the wrench wont flow and your stubs are rapidly disappearing!...plus I was in a hurry.Imagine that...
Lucky,pretty neat that your grinder wrench fit! I still needed two different sizes,though.
How I would have built that Cresent wrench /spanner is I would have drilled a hole all the way through and then insert the post and then just put a small tack weld on the back side.
I would use the smooth part from cut off drill bit for the post.