Sturdy Material: Our light bar mounting bracket is made of aluminum alloy. It is shockproof, heat-resistant, and corrosion-resistant, and works well in extreme weather conditions such as rain and storms. Mounting Diameter: 2 sets of mounting brackets, 4 sets of rubber inserts, 2 rubber strips, 4 mounting bolts and washers, 1 Allen wrench, suitable for 19mm, 25mm, 28mm, 32mm round tubes, crash bars, roll cages, bumpers. Non-destructive Installation: Pre-designed 10mm mounting holes, no drilling required, equipped with stainless steel mounting screws and washers, quick installation with turnbuckles, simplifying the installation process. Anti-slip Rubber Inserts: The included rubber pads not only protect your bumper from scratches, but also increase the friction between the bracket and the bumper, making the installation safer. Wide Application: Suitable for most off-road vehicles, cars, trucks, boats, farm vehicles and more.