an all round good trap is a 1 1/2 coilspring trap .... and they will hold up to yotes and beaver sized animals altho i wouldnt use that small of trap to go after them ...altho i have caught and held both ..... for squirrel, rabbit, mink, muskrat, coon, oppossum, etc i would go with the #1 1/2 ...... for fox, yotes, cats i would go with a 1 3/4 offset coilspring (but ya have to get the cats paw centred on the pan or ya may have alot of misses or toe catches .... have a pretty big foot) ...... for otter and beaver id go with #3 - #5 coil or longspring ...... as far as the bodygrips ..... 110 -120 for the smaller critters ...... 220 - 280 for the medium sized critters and otter ..... and 330 for beaver ..... but like somebody mentioned ... make sure ya check ya regulations ...... and if ya think ya may catch a domestic animal or even a person dont set the traps or learn how to set in those situations before tryin to trap that area .... enough people after the trappers as it is .... if people would learn what to do and what not to do we wouldnt be in such a stink now