Check the listing for details. Master Lock Safe Space Portable Personal - Black - New Unopened in Package. Color: Black, Condition: New. Listed at 24.99 USD. The Master Lock Safe Space Portable Personal is a new, unopened portable lock box in black. With its combination lock mechanism, this lock box provides a secure and convenient way to store keys or other important items. The compact size of this portable lock box makes it easy to transport and store securely in various locations. Perfect for keeping your keys safe while on the go or while away from home.