Kaba Simplex 5021BWL26D Mechanical Pushbutton Cylindrical Lock with 2-3/4" Backset; Best Prep and WiKaba Simplex 5021BWL26D Mechanical Pushbutton Cylindrical Lock with 2 3 4" Backset; Best Prep and Winston Lever Satin Chrome Finish Fully Mechanical Lock Eliminates the Material and Labor Expense of Battery Replacements Single Access CodeOne Easy to Manage Code for All Users Lock is Easily Programmed Via Keypad Without Removing Lock From the Door Vandal Resistant, Solid Metal Pushbuttons Extra Heavy Duty, Solid Cast Housings, Solid Cast; ADA Compliant