Description: 8 sets stainless steel screws and nuts Universal fits any track / rail systems on kayaks Great kayak mounting hardware replacement kit accessories Use these nuts to secure just about any item to tracks for easy mobility. Screw: M6 x 20mm; Nut: 29 x 13 x 3mm / 1.14 x 0.51 x 0.12 inch Package Includes: 8 Sets Kayak Rail/ Track Screws and Nuts