High Quality: The adjustable hook is made of high quality metal, sturdy and durable. Display your artwork with this sturdy and durable museum-quality hanging system. Package Contents: Each package contains 4 pieces. Features: The adjustable hook is only suitable for 1.2-2mm steel wire rope, used for hanging frames with D-rings or metal wires. The maximum load capacity of each hanging system is about 30kg. Application: Suitable for various photo frames and hanging decorations. Suitable for gallery, office, library or home extendable hanging system. Usage: The hook can slide on the rope. For heavier frames, it is recommended to use two ropes to distribute the weight and ensure stability. The hook-and-loop hook is adjusted by pressing the top button, locks after unlocking, and is equipped with an anti-theft bracket to prevent the decorations from easily coming loose or falling due to shock or vibration. Shipping Quantity: 1 piece