Master Lock 5490EURD Retractable Tether for Key Safe, Up to 91 cm Long, Black. Ideal to ensure all keys are returned to the key safe after use. Perfect for sharing and securing keys for personal aid, real estate agents, babysitters, workers, cleaning staff, and more. Features a plastic case with high-strength bonding tape for easy and permanent installation, fitting almost all Master Lock Key Safes. The tether has a twisted steel cable of 91 cm and includes a hex key for attaching one or several keys. Comes with a Limited Lifetime Warranty.