Eway Cross Zine Alloy Pendent Bracelet Strap with Anti-lost Watchband-style Closure for Fitbit Flex Wireless Activity and Sleep Wristband One size fits more. Free size fits your wrist depend on closure site you place. The replacement wristband with a secure watchband-style closure keeps your Fitbit on your wrist. FOR FITBIT FLEX BAND ONLY, Not For Fitbit One, Force or other models. Package Include: 1 pcs Replacement Bands with Secure Closure for FITBIT FLEX BAND Bracelet & 1 pcs Opening Tool Kit for Fitbit Flex Wireless Activity.