Arlington Low-Voltage Mounting Bracket, 2-Gang Overall Dimensions - 1.7"L x 4.2"W x 4.25"HIncludes Flag Post), Flange Thickness - 0.050" Sticks out less from the wall. Panel Cut Out Dimensions - 3.83" W x 3.60" H, Gang: 2 Gang Clamps to Walls or Panels - 0.30" to 1.0" Thick. Side Wall Thickness - 0.080", Panel Cut Out Dimensions - 3.83" W x 3.60" H Dual Gang Open Back Bracket. For Retrofit Applications - Post Construction. Run More Wire Easier with Brackets vs Boxes. Mounts to Panels, Sheetrock Etc. Impact Resistant Plastic results in less breakage on Job site. Easy Flat Sided Wall Panel Cut-Out - No Weird Cut-Out.