Thank you for viewing. This is a helmet hook (helmet lock) for the HAYABUSA. It is my original product. It can be installed on all models 1-3. *This product does not fit the small D-rings of the GT-Air. Please be aware.* The SET you will receive is shown in the last image. It includes a plate, spacer, bolt, and flat washer. All materials are stainless steel. A lock is included for a limited time. Please refer to the images for the installation location. Remove the original bolt, and then install in the following order: vehicle, spacer, plate, flat washer, and bolt. The original helmet holder is located under the tandem seat and is not very convenient. (In my opinion.) I had trouble finding a place to put my helmet when I was away from my bike, especially when I couldn't remove the tandem seat due to a seat bag or luggage. It's easy to use: simply insert the helmet's D-ring into the hook (plate). If you are leaving your bike, you can use the included lock for peace of mind. Alternatively, you can use your own lock. (Please note that some locks may not be compatible, so please use your own judgment.) If you purchase two of these products, you can hang helmets on both sides. Please note that the included lock may be changed without notice. Manufacturer...Suzuki Type of parts...Helmet holder Vehicle type...GSX Model...GSX1300R HAYABUSA