Kaba Simplex 7100 Series Metal Mechanical Pushbutton Auxiliary Lock with Thumbturn, 25mm Tubular Deadbolt, Flat Front Face Plate, 60mm Backset, Satin Chrome Finish Single Access Code Fully mechanical lock eliminates the material and labor expense of battery replacements Field reversible Handing Highly weather resistant Vandal resistant solid metal pushbuttons (5 buttons)