Kit includes 1 metal backing plate, 2 ladder lock bushings and hardware kit, you supply front half of RotoPax brand mount/handle and lock. Turn your rack or ladder into a mounting point for your RotopaX gas or water packs. This premium RotopaX mounting kit consists of one laser cut, heavy-duty thick steel backing plate, two Starboard HPDE Ladder Lock Bushings to lock the mount securely in place while protecting the finish of your ladder and longer, more durable mounting hardware to fit the standard mount for your RotopaX gas packs. The metal on the RotopaX half of the mount is quite thin, this kit prevents that metal from bending during installation and provides the ultimate in stability. With longer hardware than what comes standard with your RotopaX mount, you can mount your packs to different racks, crossbars or ladders. This kit allows you to mount your RotopaX to round tube thats up to 1" thick. A great way to mount to the crossbars on your Yakima, Rhino, or Thule racks. Perfect for Gobi ladders, or Baja Rack ladders. And you can stack mount multiple packs without compromising durability.