This trap comes with a pre-made bait cup for accurate triggering and easy to set up. Made of durable plastic and washable, it won’t lock up odors and stains like old-fashioned wooden mousetraps. It is simple, better and more hygienic. Precision stainless steel springs mean nowhere to escape, no more bouncing traps and stolen baits. Can kill mice cleanly without damaging the skin, no blood, dirt or smell.