From Foil Drive

The Hydrofoil Wingscrews from www.customwingscrews.com allows for easier install of your mast and Gen2 system to your board.

Satin dark grey anodized 6061-T6 Aluminium Wingnuts with Stainless Steel Helicoil Inserts. Grade 5 (6Al-4V) Titanium M7x1 studs and t-nuts. For use with Foil Drive Gen 2 MAX (not for use with SLIM). Will work on boards with either Futures style tracks or deep tracks. Designed to be used with the Armstrong Performance mast as well as masts that use M8 hardware. May not work with Cabrinha Carbon Masts or others will deeply recessed screw holes.