MatSailer Shade sail Hardware kit,5 Inches 316 Marine Grade Shade sail Installation kit for Rectangle and Square Patio Shade, 24 Pcs;

The Sun Shade Hardware Kit is the best device to install your Sun Shade Sail. 
Descriptions:
Package including: Turnbuckle x 2, Pad eye x 4, Snap Hook x 2pcs, Screw x 16pcs.
Turnbuckle- A device for adjusting the tension or length of ropes, cables, tie rods, and other tension systems.
Snap Hook- A metal loop with a spring-loaded gate, used to quickly and reversibly connect components.
  Pad Eye- A flat metal plate with a projecting loop or ring, made all in one piece, providing an attachment point. It is secured by screwing, bolting, or welding it in place. 

Having the proper hardware makes installation so much easier compared to piecing it together yourself.