High Quality - This 8 RECTANGLE/ SQUARE sun shade sail installation kit is made of high quality 316 marine grade stainless steel. Grade 316 stainless steel is extremely strong and resistant to the elements. Hardware Kit Includes - Accessories set includes: Turnbuckle( 8") x 2pcs, Pad eye x 4pcs, Snap Hookx 2pcs, Screw x 16pcs, Plastic expansion x 16pcs. Adjustable Turnbuckle- The sun shade sail kit has adjustable turnbuckle to create tension to make your sails get tight in installation. You can choose how far your sail shade is from the wall/ post/ point to which it is fixed, length from 8" to 11". Plastic Expansion- Our sail shade hardware kit has configured extra plastic expansion to fit screws. The screws works more firmly with plastic expansion rather than directly attached to the wall. Wide Application- 8 RECTANGLE/ SQUARE sun shade sail hardware kit is great fit for installing all RECTANGLE/ SQUARE shade sail