Heavy duty hardware kit made of 316 stainless steel Hardware Kit Includes : Turnbuckle( 6") x 2pcs, Pad eye x 4pcs, Snap Hook x 2pcs, Screw x 16pcs, Plastic expansion x 16pcs. Turnbuckle can be adjusted from 6 inch to 8 inch Fits most of sun shade sails on the market which have with D rings or round rings on the corner We provide one year warranty on our products Hardware kit for rectangle square sun shade sail