The MBD-1K 3-1/2" Deep One-Gang Masonry Box with Concentric Knockouts is designed for approved electrical device installations in masonry or concrete wall applications.

This one-gang masonry box provides added depth for wiring space and is commonly used for switches, receptacles, and other wall-mounted electrical devices. The concentric knockouts allow for flexible conduit entry options, making it practical for electricians, contractors, builders, and maintenance teams working on residential, commercial, and light industrial projects.

Its galvanized steel construction helps provide durability for rough-in installations, while the deep box design supports clean device mounting in approved masonry wall applications.

Always confirm box size, conduit entry requirements, device compatibility, fill capacity, and local electrical code before installation.

Key features

• One-gang masonry box
• 3-1/2" deep design
• Concentric knockouts
• Galvanized steel construction
• Designed for masonry and concrete wall installations
• Suitable for switches, receptacles, and wall devices
• Provides added wiring space
• Practical for residential, commercial, renovation, and contractor electrical work

Best used for

• Masonry wall electrical rough-ins
• Concrete wall installations
• Switch installations
• Receptacle installations
• Commercial electrical projects
• Residential renovations
• Light industrial wiring
• Contractor electrical installations