Tomcat Rat Killer II refillable bait station contains one tier-1 refillable rat sized bait station with 15 x 30 gm bait block refills. Tier-1 stations meet EPA'S highest standard for bait station security and are proven resistant to tampering by children and dogs. Bait is made with Bromethalin an acute, non-anticoagulant active proven to kills rats and mice faster than anticoagulant baits. Each 30 gm block kills up to three rats, based on no choice laboratory testing.