Heavy Duty T-Grid Box Hanger | Lay in and Troffer Support Clip | Acoustical, Ceiling and Partitioning, Electrical | For Threaded Rigid 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 SocketFurbay Electric Supp