OSBEL MT-3 Big Metal Mouse Snap Trap 4 Pack Preformed bait cup allows for easy baiting Durable polystyrene and steel construction.MT-3 can trap big mouse. Mouse Trap resist stains and odors common in old-fashioned wooden traps. Mouse Trap is simple, safe and sanitary.Can be reused for years of service Attention: MT-3 is stronger ,Please watch out for your finger/kids/pets when using mouse trap.