Package contents Several metal bird house guards for eastern bluebird houses 16 mounting screws included Key benefits Protects nests and chicks: creates a durable barrier around the entrance to prevent predation or damage from cats, larger birds, raccoons, and other animals. Longlasting in outdoor conditions: galvanized and corrosionresistant construction helps prevent rust and extends service life. Proper fit for eastern bluebirds: 2 x 2 inch opening sized for eastern bluebirds — helps keep larger predators out while allowing bluebirds to enter and exit. Materials and construction Constructed from quality copper material with a galvanized treatment for added antirust protection and durability. Sturdy design resists chewing and pecking from animals, helping maintain the integrity of nesting boxes. Size and compatibility Opening size: 2 x 2 inches. Please check the specific size in the product picture to confirm fit for your nest box. Designed for use with standard eastern bluebird houses and similarsized nesting boxes. Performance and installation Easy to mount: includes 16 screws for quick installation on multiple boxes or replacement parts. Stable and secure once installed; helps preserve the nest box structure and reduces the need for frequent repairs. Practical use scenarios Backyard bird conservation: retrofit home bluebird houses to improve nesting success and protect chicks from predators. Community or park nest box programs: install on multiple boxes to standardize protection and reduce maintenance. Wildlife rehabilitation and monitoring: use on boxes where you need reliable protection during nesting and rearing periods. Notes Verify the 2 x 2 inch dimension against your nest box entrance using the product image before installation. Designed specifically for eastern bluebird houses; compatibility with other species depends on entrance size and box design.