These traps have the advantage of allowing the mouse to be released into the wild.It is a simple device with a heavily spring-loaded bar and a trip to release it. Cheese may be placed on the trip as bait, but other food such as oats, chocolate, bread, meat, butter and peanut butter are more commonly used. The spring-loaded bar swings down rapidly and with great force when anything, usually a mouse, touches the trip.
Rats are often shy of new objects and the placement of unset traps in a new location for a week or two will increase the opportunities for catching.