Single Gang Round Low Voltage Drywall Mounting Bracket, 25 packDescription Single One Gang Round Low Voltage Drywall Mounting Bracket Our round low voltage drywall mounting bracket is a single gang bracket that is used on existing construction. It is designed for low voltage class 2 installations, providing a fast installation with the use of a hole saw. The single gang bracket installs with a 3. 5" hole saw, it adjust to fit 1 4" to 1 1 2" wall thicknesses using the mounting wings which hold the bracket securely