From the Manufacturer

This non-metallic unit can be used in new construction, or if you’re re-wiring your current home for a flat screen TV. The low voltage mounting brackets are the time and money-saving solution for faster and easier mounting of Class 2 communications, computer and cable TV wiring. The bracket is its own template. Level the bracket on the wall. Then use the bracket as a guide for the cut out by tracing a line around the inside. Designed to mount wall plates flush, our mounting brackens offer features that deliver a better-looking, easy to install job. It adjusts to fit 1/4-inch to 1-Inch wall thicknesses. The unit can be mounted vertical and horizontal. The wing design provides secure mounting by flipping up as the screws are tightened. The Thin front lip seats better on drywall. The oval hole allows lining-up and final straightening or shifting of device. Finally the Arlington fittings are carefully inspected and our manufacturing process is designed to prevent the possibility of a defective product leaving our plant. In the event any of our products are found to be defective, we will replace them with new product free of charge. The time limit for this warranty is one year following the date of sale or one year after the date of installation, whichever is the earlier date. This warranty does not apply when the product is used for any purpose other than the intended use as described in the Arlington literature. This warranty does not apply when the product is used for any installation which would violate the national electrical code or any code which takes precedence in a particular jurisdiction. Labor is not included.