Heavy Duty Retractable Wire Rope: Retractable keychain using a diameter of 1mm thick retractable steel wire cable can withstand a load of up to 8.8 ounces and over 100,000 stretches free retractable, steel wire with PVC coating made of durable and does not hurt the hand, will not break and wear than the general retractable fob durable and more than 2 times the load-bearing capacity, affordable