Spring Coil Keychain Key Cellphone Snap Hook Cord Retractable Key Ring with Metal Lobster Clasp Pack of 4 Package included: 4 pieces of Snap Spring Hook Coil Size:Coil cord length: 5.9, strap Dia.: 0.4, Circle ring Dia.: 1 Theftproof Spring Coil Safety Keychain Retractable Coil Strap for key ring, phone, hand tools, ID pass, torch and more, with aluminium carabiner to one end and key ring/lobster clip at the opposite end.