But Crescent's wrench is at least usable with one hand.
There are problems with Rose's wrench design, and I suspect it didn't make it much past prototype, when someone actuly tried to use it.
To put it on a bolt, you have to hold the wrench with one hand, draw back the dogging block with , I suppose your thumb, and push in the jaw piece with your other hand (now using both hands at once) and also wiggle it on the bolt to make it fit tight. And then , the dogging block, which is knurled, will slip back to the last full knurled groove, so the wrench will never be quite , entirely tight on the bolt.....
I suspect that a wrench was promised to customers, the new design didn't work out, so someone made a panic call to Crescent (or whoever) ...