4,Southwire 4 in. W x 2-1/8 in. D Steel Metallic 2-Gang Square Switch Box, Six 1/2 in. KO's, Two 3/4 KO's and Four CKO's MGSB-2-UPC,Southwire 4 in. W x 2-1/8 in. D Steel Metallic 2-Gang Square Switch Box, Six 1/2 in. KO's, Two 3/4 KO's and Four CKO's MGSB-2-UPC,Steel City 531511234UB Pre-Galvanized Steel Square Box Extension Ring with 1/2-Inch and 3/4-Inch Knockouts,Workington Portable Metal Tool Chest with 4 Drawers, 20