Easy to install Includes 6 galvanised screws for secure mounting Can be installed in a few minutes, simplifying retrofitting of existing or nesting boxes Flight hole adjustment Protective plate design allows adjusting the flight hole diameter Enables compatibility with a range of bird species by resizing for the preferred entry Snow safe protection Guards against the entrance hole being enlarged by snow Helps keep the cavity secure and prevents access to the nestlings Key benefits and features Function: protects the nest cavity by preventing hole enlargement and enabling speciesspecific sizing Compatibility: adaptable for different bird species through adjustable flight hole diameter Practical performance: quick installation with durable screw hardware, designed to maintain hole integrity in snowy conditions Use scenarios Backyard birdhouse with multiple resident species: adjust the flight hole to suit different birds as needed Winter or snowy climates: prevent snow from enlarging the entrance and compromising nesting safety Educational or wildlifefriendly setups: tailor access for observing nest behavior while protecting young birds What you get Protective plate with 6 galvanised screws for easy, fast installation Adjustable flight hole mechanism to accommodate various species Snow protection feature to maintain nest integrity and safety