Open-backed to easily accommodate the bend radiuses required for low voltage cabling and deep devices such as volume controls and is designed to fit a standard 1-gang faceplate. It also features an easy nail-on mounting or screw-in bracket, while the hard shell provides increased durability and no racking. Resi-Rings accept 3 /4, 1 and 1-1/4 in Resi-Gard. Easy nail-on mounting or screw-in bracket, while the hard shell provides increased durability and no racking Resi-rings accept 3/4, 1 and 1-1/4 in resi-gard