This is the best billet fire extinguisher mounting bracket weve ever seen! The pull pin has an oversized, easy to spot, red anodized billet knob. The mounting housing is strong and indexes for a quick connection. Hose clamp screws are hidden in the housing for a clean appearance. Works great for small Nitrous bottles too! Roll bar mounts are available for 1-1.25",1.50". 1.75", 2.0". Use the panel mount in your car, at the shop or in your trailer.