I think you have misread. That is item 420 with a 7" opening, they also sell item 430 with a 10" opening.
I'm guessing you haven't done a lot of pest control if you think either suitable for fox! Fox are generally snared then shot ( or just shot)
A 220 would be suitable for small mustelids. I would imagine it could indeed be used for Mink on a suitable raft, although I would prefer a cage trap and a shot to despatch for fear of non target species.
When I use body hold traps it normally a Fenn trap ( no 4 or 6) for rats in artificial tunnels or rabbits in warrens. I prefer large cage traps on the surface, even with great care I get the odd hedgehog using rabbit runs and with cages I can just release them. Same for rats in open areas. I use both tunnel and scissor traps on moles.
Vermin management is an important part of land stewardship and is both necessary and ethical.