Lock Boxes & Safes

The Master Lock No. 5490 Key Tether features an extra long 36 in retractable cable allowing enough flexibility to access the door from a variety of portable and wall mount locations. The Tether is the perfect solution to make sure keys remain in the lock box after use. Easy to install with its permanent, high-strength bonding tape, the Key Tether is designed for use with our mechanical or Bluetooth enabled lock boxes (except models 5406, 5422, 5423). It provides a dual layer of protection by securing your keys to the lock box – ensuring your keys stay at the door. The Limited 2 Year Warranty provides peace of mind from a brand you can trust.