This bracket is used to mount your Banshee Horn to a convenient bolt on your vehicle. It’s made from steel and is powder coated black. It’s 2 ½” long overall. The hole sizes are 5/16” (8 mm), and the distance between the two holes is 1 ¾” (45 mm). It’s 3/4” (19 mm) wide, and 1/8” (3 mm) thick.