Detachable and lockable storage case fits helmet, raingear, what-have-you. Universal mounting base and hardware included (nuts, bolts, washers, luggage rack brackets.) Base is simple to mount on any luggage rack, which then allows you to easily attach and detach the box and bring it along with you, if desired. Small scratch does not affect strength or function. Bought at Kgeez Cycle for $100. Selling for $50. Please email.