Never again need a screwdriver to install, adjust, or remove your longboard fin or stand up paddleboard fin. Originally designed for the iSup market, The "No Tool" longboard screws and plate hold your center fin in place just as before, but are tightened by hand and held in place by the spring force of an o-ring. Be overjoyed by never needing a screwdriver, being able to adjust your fin position mid-session, and spending more time on the water, if that be on your SUP board, inflatable SUP or a 9'0" noserider. Whether you are the type to call it is a skeg or a fin, we got you covered. These are quality built, with clean edges and smooth threads. Dimensions of plate fit all standard fin boxes. All Santa Barbara Surfing products are quality built, no fluff gear to get out on the water. Rider tested on world class point breaks, our mission is to spread quality gear far and wide to our water sliding friends. Compare this to the E-Z Bolt, Wonderbolt, Quick Fin Release (QFR) or Thumbscrew versions. Note: These are not compatible with Starboard or Naish brand paddle boards.