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4" Square Conduit Boxes   4" Square Boxes 1-1/2" Deep   4" Square Boxes 1-1/4" Deep   4" Square Boxes 2-1/8" Deep   4" Square Boxes 3-1/2" Deep 4" Square Bracket Boxes 1-1/2" Deep   4" Square Bracket Boxes 2-1/8" Deep   4" Square Extension Rings 1-1/2" Deep   4" Square Extension Rings 2-1/8" Deep   4" Square Flat Covers   4" Square Garvin Covers   4" Square Mud Rings 1 Gang   4" Square Mud Rings 2 Gang   4" Square Offset Mud Ring   4" Square Tile Covers 1 Gang   4" Square Tile Covers 2 Gang   4" Square to Round Device Rings   4" Swivel & Kwik-Hang Fixture Covers   Wire Protector Pans 4-11/16" Conduit Boxes Conduit Body Electrical Boxes & Covers Handy Boxes Electrical Boxes & Covers Masonry Electrical Boxes & Covers Multi-Gang Electrical Boxes & Covers Octagon & Round Electrical Boxes & Covers Stainless Steel Electrical Boxes & Covers Switch Boxes Electrical Boxes Plastic Fasteners, Hangers & Clamps Fire Alarm / Emergency Boxes & Covers Fittings, Hubs & Bushings Fixture Whips & Grips GFCI--Ground Fault Circuit Interrupters Grounding Products Lighting & Lamps & CFL Bulbs Service Entrance Products Switches, Devices & Receptacles Tools & Install Accessories Wall Plates Weatherproof Boxes & Covers Aerial Drop Wire Hardware Beam Clamps Bridle Rings Bulk Wire & Cable Cable Management Distribution Rings Fire Prevention Products J-Hooks Jacks, Face Plates & Bezels Patch Cables Rope, Twine & Pulling Tape   4" Square Conduit Boxes: 4" Square Bracket Boxes 1-1/2" Deep 4” Square Bracket Electrical Box 1-1/2” Deep Wood Spike 1/2" & 3/4" Concentric Side Knockouts 4” Square Bracket Electrical Box 1-1/2” Deep Wood Spike 1/2" & 3/4" Concentric Side Knockouts is installed in walls & ceilings for switches, devices & light fixtures. Square electrical boxes are used to run multiple conductors in two or more directions to bring power to multiple electrical devices. Type: Welded Knockout Sides: 1/2” & 3/4" Concentric Knockouts Knockout Bottom: (3) 1/2” & (2) 3/4” Bracket Style: Wood Spike Cubic Inches: 21.0" Material: Steel 52151-SWB Call 866-770-4693 for details on volume discounts.