Koonce easy set cage traps. Heavy Duty, coon proof construction with rear bait door. Treadle will trip with 1lb. of pressure, but trap will not trip if a raccoon shakes the trap or crawls on top of it. Just lift the spring loaded door up until the trap sets itself. 12"x12"x36". " This is the only cage trap we carry, because this is the only cage trap I would use hands down"