Lobster Clasp Stretch Coiled Cord Keychain Key Holder 42.5cm Long Blue Plastic,Metal Size: 42.5cm/16.7";Ring Diameter: 7mm/0.27"(Cord Dia) Great for keys, phone, flashlights, compass, backpack, water bottle, etc. One end is a strap keyring, the other is a swivel lobster clasp. This spring stretchy coil cord can keep your little items in your controllable range. Lobster clasp is for easy and convenient clasping on your bags, pouches, etc.