The smarttune 5/16” (the second smallest in the smarttune range) is designed specifically for sports and day boats. In minutes it easily swaps in for your existing turnscrew (forestay/backstay/shrouds/diagonals). Designed to be used for long spells in extreme conditions, it charges wirelessly for an astonishing 2,000 hours of continuous battery life and displays live load data direct to your Atlas 2 display.