Non-metallic, old work electrical box extension. Extends electrical box that is set too deep in the wall. Compatible with most single-gang or multi-gang wiring boxes. Ideal to use when remodeling. Snaps together quickly for multi-gang configurations. Maximum extension of 1 inch provides flexibility, and installation is easy. Durable PVC (polyvinyl chloride) construction is rust proof and will not conduct electricity. Includes (2) #6-32 x 1-1/4 inch screws per extender. For indoor use only.