Fdc Deep Depth 1-Gang Cast Device Box | For Adapting Non-Metallic Conduits to Threaded Fittings, Metallic Systems | For Direct Burial Cables | For Use With Conduit | For Use With Sheet Metal | For Use With Threaded Metal Conduit and Imc | Hex-Key Ends Are Square-Cut for a Secure Full-Depth Fit and Maximum Contact With the Hex Socket to Prevent Slippage and Stripping of the Socket