2 sets of universal crossbars are made of high-quality metal steel: durable and rust-proof, ensuring your safe use and reliability and longer service life. This light fixture mounting bracket adapter is designed to connect light fixtures and canopies to electrical junction boxes. The 2-pack can meet your multiple needs, you can use it to install wall lights, near ceiling lights, LED lights, pendants and chandeliers, bathroom vanity light fixtures. 4-inch diameter universal mounting plate fits most ceiling lights Includes ground screws, wire nuts, and rail mounting screws so you can simply use it to mount your light fixture, no need to purchase additional mounting hardware. The color of accessories is random and cannot be specified. Colour:Silver Material:Metal Size:About 10.1cm diameter Package Contents: 2 x light rails 8 x screws 14 x nuts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.