The Hip Klips are great just by themselves too! I personally use a KLIP for my keys... this allows me to get into the house, my truck or my office without having to fumble searching for them or fiddle with getting it off my Hip Klip and Pocket Accessory (which I always have on me too). Yes, you can easily attach your keys to your current Hip Klip pocket Accessory. The bottom of the klip that attaches to the pocket has a snap bolt on it, so that you can switch out the klips and pockets. Simply open it up and add your keys to it. That easy. No more searching for keys. I usually have my hands full ( I can't even tell you why), so having my keys attached to their own Hip Klip makes it super convenience to detach them with one hand. The Klips below can be purchased by themselves, or view them here, and add them to any pocket on the other pages.