The Tusk Universal Pannier Box Mounting Kit is a great way to mount any hard pannier box to almost any pannier rack system. The kit uses 4 mounting pucks per pannier box (2 solid mounts and 2 easy release hand knobs) to securely attach your luggage to your bike. The pucks are made from a durable fiber reinforced plastic while the metal hardware is a corrosion resistant stainless steel. Kit comes with 4 pucks and all required hardware for mounting one pannier box. Universal pannier mounting kit. Mounts hard pannier boxes to most pannier rack systems. Durable, corrosion resistant materials. Enough mounts for one pannier box.