The Bait Cage Kit was thoughtfully engineered to be easy to use, fit the most popular snap-type rat traps, and allow you to set multiple traps at one time. As a bonus, each kit includes a packet of the best food bait for rat traps. The patent pending Bait Cage will keep the bait on your rat trap fresh [traps stay effective indoors or outdoors until rat is caught] and secure [locks the bait to the trap and keeps the rat feeding until trap is triggered] so you can be successful getting rid of rats for good.