If the bracelet is the same as my UPO it will have pins which you'll need a pin removal tool to get out. You can pick the tool up cheaply on ebay. Even when you have pushed them out it is still a struggle with pliers to pull the pin all the way out. Then use a small hammer to put the pins back in. When you pull the pins out make sure the little jacket in the middle link is still in place, if you fit the pin without it it will just fall out. There should be arrows on the bracelet to show you which way to push out the pins.