This kit has everything to ensure that your kayak is mounted extra securely. Features Non-Skid anti–slipping blocks for use on vehicles without racks. Compatible with Yakima™ and Thule™ crossbars. Compatible with after-market racks and vehicles without racks, the Deluxe Kayak Kit fits most cars. Non-skid foam blocks eliminate slipping on wet cars. Extra-long bow and stern straps for larger vehicles. Includes: 2 Deluxe Kayak Non-Skid Blocks 2 18’ Bow & Stern Cam Buckle Straps 2 9’ Block Straps 1 15’ Center Strap with Cam Buckle 4 Galvanized Steel S-Hooks.