Fin Track Cleat,Fits in the Fin track of your longboard or stand up paddleboard and Surfboards without a leash plug,Use the Cleat for if your Surfboard does not have a leash plug The Cleat uses a one way tensioner screw and will not harm your surfboard in any way. Made from Stainless steel.Excellent for Longboards and Stand Up Paddleboards (SUP),