Grandpa's rat trap cage is commonly referred to as a two-door multicatch repeater due to its ability to trap as many mice as possible. The large main door with double locking bar engages the first rat and the one-way entry rear door catches the other door. Ideally, there is a http://soonie-complicatedlife.blogspot.com/2018/09/best-rat-traps-2018-buyers-guide.html