Just installed them on my vulcan 900 with iso grips they make securing my helmet so easy. dont go by the picture they are sold individually i bought two, the only suggestion i would say now that its to late for me is ask if you could get them keyed alike mine has 2 different keys but the keys are numbered so its not to confusing.
First one lasted ~ 1 yr, lock cylinder messed up with my lid in it. Used a screwdriver as a wedge and broke the end right off it. Definitely not billet, more like cast pot metal. Second one has ~ 5 uses now and can feel the cylinder starting to give out, won't use it any more, looking into alternatives but haven't found another similar and probably won't. They're just not well made, should be stainless, that would be the BOM!
This lock looks great and the idea is fantastic, but... buyer beware. It worked well for a few weeks, but then it just decided to stop working at the most inopportune time. I was left stranded in a parking lot in the middle of a storm trying to detach my helmet. I ended up having to walk to a local hardware store to purchase some allen wrenches to get the lock off the end of my handlebars. I returned this product and highly recommend that you consider something else. It's a great idea, but the lock itself is of very low quality.