This set contains the foil to board mounting screws for attaching the Sonar Board Adaptor or Sonar Carbon Mast to the Sense Foilboard and the Chase Foilboard. This screw set is also supplied as a standard accessory with the North Sense Foil board. includes: 4x M8x23 TH CSK T40 Screws, 5x M6x18 for Fee-lo Straps, 6x M6x20 for Free Straps