Consumer clear pack. Grade 2 security entry knob with SmartKey cylinder. SmartKey cylinder eliminates traditional pins and springs. Cylinder design provides instant re-key functionality. SmartKey cylinder is a bump-resistant, higher pick-resistant lock. Included with each lock is the re-keying learning tool that allows the lock to be re-keyed in 3 easy steps. Fits all standard doors 1-3/8' up to 2'. Standard adjustable backset 2-3/8' - 2-3/4'. Requires 2-1/8 diameter lockset bore hole and a 1' diameter latch hole. Has an adjustable backset 2-3/8'. Knobs are keyed alike in multiples of 4.