1. Extendable Key Chain: This set includes 5 zip coupling key rings, each featuring 2 split rings for attaching metal key fobs with a quick release function to secure keys and accessories. The total length of the quick release key pendant is 8 cm, and the diameter of the key carabiner is 2.5 cm. The package provides ample quantities of quick release metal key rings to meet your needs. 2. Quality Material: The coupler keychain is crafted from iron alloy, ensuring durability. The removable, pull out key fob resists breaking or deforming. The detachable keyring undergoes a polishing process, resulting in a smooth, burr surface and edges that are gentle on your hands. The double ring keyring is rust proof, corrosion resistant, and built to last, offering a robust and extendable key fob solution. 3. Removable Design: The detachable key ring is equipped with a strong spring, allowing effortless removal and reattachment with a simple press. The metal key ring has a robust plug in design that prevents accidental loosening, ensuring your keys stay securely in place. 4. Easy to Use: The quick release key ring is designed for convenience. By pressing the female push button switch, you can effortlessly remove or lock your keys. A spring loaded ball bearing clutch mechanism safeguards against accidental release, enabling easy access to your keys without the risk of loss.