KEYED ENTRY: Use on doors where extra security is needed, turn piece interior locking, exterior locking using a key. Recommended for exterior-facing doors. SMARTKEY SECURITY: Kwikset's SmartKey Security technology protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds. Do it yourself, installs in minutes with just a screwdriver. Reversible handle for left- or right-handed doors, detailed directions provided. Fits standard size doors 1-3/8" to 1-3/4" thick, latch backset adjusts to either 2-3/8" or 2-3/4" with just a twist during installation. CERTIFIED TRUSTED QUALITY: Security, Durability and Finish are Grade 3 BHMA certified, designed for reliable protection, providing peace of mind at home. BOX INCLUDES: Entry levers, latch with round and square front options or drive-in collar, strike, SmartKey tool, 2 Kwikset keys, rosette, screws and Allen wrench. WARRANTY PROTECTION: Our products are backed by a lifetime mechanical and finish warranty with great customer service, see Kwikset warranty for more details. MICROBAN PROTECTION: Kwikset's door hardware is treated with Microban, this offers powerful product protection that is 99.9% cleaner than an unprotected surface.