The Nelson Blue Devil Electric Water Bucket Heater is the perfect solution for keeping your outdoor dog's water at just the right temperature even in the coldest conditions. A heavy gauge, stainless steel bracket secures the Blue Devil to your dog's water bucket where it will prevent the formation of ice. A security chain that snaps onto any kennel fence will prevent the heater cord from being pulled out, while a copper sheath protects it from chewing. The Blue Devil can be used with any type of bucket up to five gallons - metal, plastic or rubber.