Pre-drilled ready-to-fit copper hole protector 29mm for nest boxes.
The purpose of the hole protector is to prevent the wooden nest box entrance hole being enlarged. Either by pecking or gnawing. Unprotected entrance holes on wooden nest boxes are often attacked by squirrels, woodpeckers and even small mammals in an attempt to enter the box for nesting or in some cases to predate on the eggs and fledglings of small birds. This results in damage to the nest box or at worst lost broods.
The 29mm hole protector is ideal for small hole nesting species such as blue tits, coal tits, marsh tits etc. Larger 32mm size available for slightly larger species such a great tits and house sparrow. Fix using 4 small screws to any wooden nest box.