Kaba Simplex 710819 Mechanical Pushbutton Auxiliary Lock with Thumbturn 1 Inch Deadbolt and 2-3/8 Inch Backset Black Finish

Simplex mechanical pushbutton locks offer a convenient way to control access between public and private areas. There are no keys or cards to manage, no computers to program, no batteries to replace, and combinations can be changed in seconds without removing the lock from the door.