Compatibility：This AirTag keychain holder is specially designed for Apple AirTags and is especially compatible with Apple Air Tag 2021 GPS Item Finder. | Double Secure Locking: The Metal wire rope plus a hex wrench double-stabilizes your Airtag, locking it securely in place. Airtag holder boasts a sophisticated locking mechanism with a sturdy braided steel cable. The metal wire rope is highly resilient and is protected by a rubberized coating on the outside of the rope to prevent scratches and effectively lock up any valuables. It's ensured your Airtag remains securely fastened to your belongings,provided the strongest protection for your expensive airtag. | IPX8 Waterproof Performance：With IPX8 waterproof 7m (20ft) performance and more than 5000 tests, it is sweatproof, waterproof and rainproof, making it ideal for daily waterproofing. Washable, easy to remove when dirty. | Shockproof Materia: Made of PC material,3 times harder than pastic, shatterproof and crack-resistant, reducing the cost of frequent replacements and saving you $160 a year. Rugged shell provides heavy duty protection, shock resistance and no damage. The most reliable protection for your AtrTag and property！ | Easy Installation:Just open the holder, insert your Airtag, thread the cable through your item, and tighten the screws using the provided hex key. Insert the hex key into the screw of the case and then open it counterclockwise. Tighten it clockwise to close. You can attach the AirTag case to dog/cat pet collars, car keychains, bags, schoolbags, valuables, and more.