Unlike most steel bracelets, which rely on spring pins for micro-adjustments, our NodeX™ clasp allows you to quickly make sizing adjustments on the fly, by simply pressing down on a button pusher on the back of the clasp. This is not only a great feature for quickly finding the right fit for your new bracelet, but makes on-the-fly adjustments a breeze. This clasp can be installed on to any of our existing Premium Steel or Premium Jubilee Bracelets. To check compatibility, ensure that your bracelet links are attached by screws, not cotter pins.