CADDY® ALL-IN-ONE Stud-Mounted Without Mud Ring.KEY FEATURES AND BENEFITS:• Provides the flexibility to add a mud ring for non-standard drywall thicknesses• Box remains fixed in place when mud ring is removed• Includes multiple knockouts on each side of the box• Assemblies keyed for precise alignment when installed on both sides of a stud• Works with standard US and Canadian mud rings• Material: Steel• Finish: Pregalvanized• Knockout Sizes: (8) 1/2", 3/4" , (3) 1/2"• Ground Wire Included: Yes• Back Plate Pre-assembled: Yes• Box Volume: 32.8 in³• Depth: 3-5/8"• Certifications: cULus