A design classic. The mouse enters the tunnel at one end, and a door closes behind him, trapping him inside. The trap has enough air holes and turning space to prevent him becoming stressed, but it should be checked regularly so that it can be released as soon as possible after catching. To release the mouse, simply separate the two ends of the trap. Then put in some fresh bait, and use it again. Lasts for years, and has no sharp parts, springs, or anything that could harm children or pets.