Features 304 stainless steel construction, almost universal installation, it is a perfect replacement kit for mounting accessories in the track system on kayaks, boats.Features:304 stainless steel construction, rust and corrosion resistant.Nut size: 29 * 13 * 3mm (1.14 * 0.51 * 0.12in).Almost universally fits any track system on boats.Mount any kayak accessories with this kit.Easy installations with M6 screwdrivers (not included).Perfect kayak mounting hardware replacement kit for kayakers. Y4617