Features: brand new and high quality Zinc alloy material: It is cast with thick zinc alloy material, which is not easy to rust and age. Thickening material: The material is thick and full, the inner core has a built-in spring design, which cushions the stress and is durable. One for key switch lock: One for key to lock, red means to lock, black means to open, convenient and practical. Spike lock design: The spike lock design is used, which is not easy to bounce and not easy to damage. Reinforced telescopic chain: Reinforce the chain, increase the pulling force, and thicken it and it is not easy to break. Package Includes: 1x Concealed Anti-theft Chain Specifications: Material: Zinc Alloy Color: Green Bronze/ Golden/ Red Bronze/ Silver/ Black/ Yellow Bronze Pull out Length: Approx 68mm/2.68inch note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.