High-quality materials: This shade sail tensioner is made of polypropylene on the outside, with high-strength metal gears on the inside and galvanized metal buckles. It is corrosion-resistant, sturdy and durable. The rope is made of nylon. Adjustable design: This rope tensioner is 5 m long and 6 mm in diameter. Both ends are equipped with sturdy buckles and a high-strength metal gear on the inside. The rope can be quickly adjusted and locked. Simply open the pulley and pull the rope to adjust it to the desired height, then secure it. Reflective design: Our shade sail tensioners are equipped with reflective dots, which have a reflective effect at night to prevent tripping hazards. Safe and reliable, convenient, fast, self-locking and anti-loosening for added safety. Lightweight, compact, easy to carry and does not burden your backpack. Safe and reliable: Our rope tensioner is easy to Use: Simply connect two hooks and pull the free end of the tent rope until you reach the desired