This Satco 90-1310 is a wire keyless lamp guard. This brass finished lamp guard features rust resistant zinc plating as well as an easy open and close design for quick re-lamping. It measures 6.1 inches in length and 3.74 inches in diameter. This lamp guard includes screws and nuts to adjust the collar. It is designed to fit a keyless socket that is 1-3/4 in. diameter.