Harris Mouse Killer with refillable bait station kills mice and rats. Package contains 20 bars and the refillable bait station is approved for use around pets. The bait station is resistant to tampering by children with its load and lock design. Harris Mouse & Rat Bars Application Directions: Clean up and eliminate any possible rodent food sources. Select areas of placement. Generally, these will be areas where rodents have been most active, such as along walls, inside cabinets, under appliances, and in basements, attics or garages. Set Bait Station. Remove bait station from package and place station in horizontal or vertical position against wall with both entrances exposed. When using multiple bait stations, place them 8 to 12 feet apart. Dispose. Maintain a constant supply of fresh bait for 15 days or until signs of mouse activity cease. Prevent: To prevent another infestation, limit sources of rodent food and water as much as possible.