Halex 3/8 in. Non-Metallic (NM) Twin-Screw Cable Clamp Connectors (5-Pack) 20511 - The Home Depot
RACO 523 2 x 3 x 2-1/2 Inch 12.5 In. Pre-Galvanized Steel Plaster Ear Mount Gangable Switch Box | World Electric Supply
Raco 248 4" Square Box, Welded, 2-1/8" Deep with AC/MC/Flex Clamps, Five 1/2" KO's and Two TKO's | NorthEast Electrical
GARVIN 72171-BXW J-BOX&CND KO | Gordon Electric Supply, Inc.
B6243 - Topaz B6243 - 4" Square Welded Box 2-1/8" Deep with Metal Stud Bracket and MC Clamp, 1/2" & 3/4" Eccentric Knockouts
Nema 4 12 Mild Steel Junction Box HJ H Series Continuous Hinge Door wi | EnclosureHub
2 Most Common Issues DIYers Make With Metal Electrical Boxes - YouTube
Clamp Type Cable Connector for Metallic Conduit Protect Cables Electric Wires Electrical Box Silver Zinc (8 Pieces,1/2 Inch) - Amazon.com
5Pack 1 inch NM Cable Clamp Type Connectors for Metallic Conduit Protect Cables Silver-Zinc - Amazon.com
Raco Part # 517 - Raco Tiger Grip 3 In. H X 2 In. W X 2-1/2 In. D Gangable Switch Box With One 1/2 In. Ko, Nmsc Clamps, Plaster Ears, Old Work - Electrical Boxes - Home Depot Pro