Electronic Keyless Lock, Function Entry with Key Override, Access Method Keypad, Mounting Style Mortise, Lock Material Zinc, Finish Satin Chrome, Series E2000, Handle Type Lever, Door Thickness 1-3/4 in to 2-1/8 in, Key Override Options Best and Equivalents (6 or 7 Pin Length); Schlage In.C In. Keyway, Hand Field Reversible, Outside Height 8 15/16 in, Outside Width 3 5/16 in, Outside Depth 2 13/16 in, Keypad Material Solid Metal, Power Source (3) AA Batteries, Battery Life 100,000 Cycles