Description Mk4 Fenn Trap (genuine) and protection cage Made in The UK Approved in the UK  to catch & kill rats & grey squirrel Mk4 Fenn traps for professional use only, pest controllers, farms, estate management and game keepers. These Mk4 Fenn traps are designed to kill, they will break bones in your hand, if you don’t understand their use or how to properly set a Fenn Trap don’t buy these traps. All that said the Mk4 Fenn spring trap is designed and approved to kill grey squirrels, rats and weasel