【HIGH-QUALITY MATERIAL】: The extension springs are made of high-strength stainless steel, with strong elasticity, wear resistance and corrosion resistance, not easy to age and rust, no deformation and no collapse under higher tension. 【EASY TO INSTALL AND USE】: Attach one end of the spring rope loop to a shade sail stake or mini carabiner and the other end to a tent or parasol. Easy to use, can be connected and fixed quickly and easily, can be removed and installed freely. 【WIDELY USED】: Our shade sail fasteners and small carabiners are ideal for camping, traveling, picnics, beaches, hiking, hunting, fishing, tents, awnings, etc. Tent awning accessories can be used in all weather. 【CAMPING ACCESSORIES】: Our shade sail springs have high toughness and elasticity for outdoor use. They can be used in all weather conditions. In strong winds, the springs cushion the wind and the tent is firmly fixed to prevent damage.