Datejust 41mm "On the Fly" Extension LinkFor Collectors Who Refuse to Compromise on Comfort If youve ever found your Rolex perfect in the morning, too tight by the afternoon, and loose again by evening, you know wrist size changes constantly with heat, cold, and movement. Your bracelet cant keep up until now. Instant, tool free 5 mm adjustment completely hidden under your clasp youll never see it, and neither will anyone else, except theyll notice your watch always sits perfectly. Installs