The Ultimate Key Holder for the Modern Minimalist KeySmart Mini is the world’s most minimalist key holder. KeySmart Mini eliminates noisy key jingle and makes keys quiet, organized and comfortable to carry. Unlike noisy keychains, KeySmart Mini keeps your keys in order and allows you to rotate one key out so you can quickly lock and unlock doors. To attach a car key fob, simply use a key ring to connect it to the band of the KeySmart Mini. Assembly Instructions: Step 1: Unscrew KeySmart Mini (use a penny) Step 2: Add Keys and Any Accessories Step 3: Replace and Tighten the Screw