Extend the depth of your electrical boxes with this pack of 12 square extension rings. Measuring 4" L x 4" W and 1-1/2" deep, these galvanized steel rings provide extra space for wiring and connections. With 1/2" and 3/4" knockouts, they offer versatility for different cable sizes. Designed for durability, these extension rings are a practical solution for electrical projects. Install them seamlessly to create a secure and organized setup. This electrical box extension ring is designed for multiple purposes with eight 1/2 inch knockouts and four 3/4 inch knockouts. Quality: This square extension ring is made of iron to ensure, effectively prevent rusting. Dimension: The capacity of this 4-inch square electrical box extender is 21.0 cubic inches. It is 4 inches square and has a depth of 1-1/2 inches. The trade size of the box is 2-gang, and a single toggle switch cover can only accommodate 1-gang. Application: This 4 inch square extension ring is designed to enclose wire connections, sockets, or switches. Ideal choice for exposing working applications. Package Include: 12 of the 4" Square Extension Ring. Additional Details ------------------------------ Product description: Extend the depth of your electrical boxes with this pack of 12 square extension rings. Measuring 4" L x 4" W and 1-1/2" deep, these galvanized steel rings provide extra space for wiring and connections. With 1/2" and 3/4" knockouts, they offer versatility for different cable sizes. Designed for durability, these extension rings are a practical solution for electrical projects. Install them seamlessly to create a secure and organized setup. This electrical box extension ring is designed for multiple purposes with eight 1/2 inch knockouts and four 3/4 inch knockouts. Quality: This square extension ring is made of iron to ensure, effectively prevent rusting. Dimension: The capacity of this 4-inch square electrical box extender is 21.0 cubic inches. It is 4 inches square and has a depth of 1-1/2 inches. The trade size of the box is 2-gang, and a single toggle switch cover can only accommodate 1-gang. Application: This 4 inch square extension ring is designed to enclose wire connections, sockets, or switches. Ideal choice for exposing working applications. Package Include: 12 of the 4" Square Extension Ring.