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 4” long overall and 3/16” (4.7 mm) thick, which is thicker than our competitors brackets. We did this to stop vibration. The hole sizes are 5/16” (8 mm) and the distance between the two holes is 3 ¼” (83 mm). It’s 3/4” (19 mm) wide.