So I am more than impressed! Have three bracelets ordered in turquoise, white and black! It shines like crazy and is an extreme eye-catcher! To lock: yes hacking is the beginning a little more difficult, but that's just a matter of practice! When, before the bracelet on the hand are the opening and closing of the bracelet exerts, it is no longer an issue! I could then already opened with one hand! At this price a real quality product! Is also comfortable to the hand! Delivery extremely fast! Real to a friend !!!!!!