Feature: No tool needed: Tighten the screws against the rubber ring easily with your hands. Anti rust: Stainless steel construction with great rust proof action. Compatible: Fit most single fin board like, SUP, longboard and paddleboard. Specification: Material: Stainless steel Quantity:1pcs Size:32*4mm Package list: 1 * Screws with Plate 1 * Fin Screws