The Master Lock 5490EURD Retractable Key Tether is a portable and secure accessory for key safes. Made of durable alloy steel and plastic, this black square-shaped tether features a retractable design up to 91 cm long, making it convenient to use. With a touch control method and a lock key type, this product comes with a limited lifetime warranty from the trusted brand Master Lock. Its compact dimensions of 31 x 14 x 31 millimetres and lightweight design of 0.03 kilograms make it an essential addition to home security systems.