This 4-inch square box extension ring is an essential electrical installation component that provides additional depth to standard electrical boxes. Constructed from durable galvanized steel, this extension ring helps accommodate extra wiring, larger devices, or thick wall materials. The extension creates additional space in existing electrical boxes, making it perfect for renovations or upgrades where more room is needed. Its square design features pre-punched knockouts and mounting holes for easy installation. The ring's professional-grade construction ensures a secure fit and meets standard building requirements for electrical work. This versatile extension ring can be used in both residential and commercial applications where additional box depth is required. Perfect for electricians and contractors who need to modify existing installations while maintaining proper electrical box volume requirements. UL listed. Additional Details ------------------------------ Product description: This 4-inch square box extension ring is an essential electrical installation component that provides additional depth to standard electrical boxes. Constructed from durable galvanized steel, this extension ring helps accommodate extra wiring, larger devices, or thick wall materials. The extension creates additional space in existing electrical boxes, making it perfect for renovations or upgrades where more room is needed. Its square design features pre-punched knockouts and mounting holes for easy installation. The ring's professional-grade construction ensures a secure fit and meets standard building requirements for electrical work. This versatile extension ring can be used in both residential and commercial applications where additional box depth is required. Perfect for electricians and contractors who need to modify existing installations while maintaining proper electrical box volume requirements. UL listed.