Maxpedition Key Retention System Keyper - Black. Once the keys are affixed to the hook the metal rings become detachable. To attach the keys to the hook first detach the metal rings and then snap the Keyper on to secure any key set. This feature allows frequent use and quick key changing. Hook the small end of the keyper to the backside of the hook and loop and then insert the key fob to the "keyper-side" (the visible side with the Hook and Loop). Specifications for Maxpedition Key Retention System Keyper 1703: Manufacturer: Maxpedition Fastener/Closure Type: Snaphook Attachment Type: Velcro Package Contents: Maxpedition 1703 Keyper We offer complete line of Maxpedition Pouches. For our complete selection of products by Maxpedition on sale please visit our Maxpedition page. For more Key Holders please visit our Key Holders store section. Maxpedition Key Retention System Keyper - Black 1703B