UPR's Bolt On Accessory Mount allows you to add an accessory to any 1in OD tubing on your vehicle, ATV, Side by Side, Rock Buggy, Sand Rail. These 2 piece brackets are made from mild steel and have a durable black nickel finish to prevent rust. Accessory mount hole is 8mm/.316" in diameter. Can be used for accessories like LED lights, bungee cord attachment points for strapping down equipment, running cables or lines through a chassis, antennas, flags, rock lights.