KEYED ENTRY: Use on doors where extra security is needed, turn piece interior locking, exterior locking using a key. Recommended for exterior-facing doors. NEVER SAG LEVER: Our exclusive design utilizes dual compression springs to keep the lever straight and wobble-free over the lifetime of the handle without the risk of saggin. SMARTKEY SECURITY: Kwikset's SmartKey Security technology protects against advanced break-in techniques and allows you to re-key your lock yourself in seconds. FITS STANDARD DOORS: Fits standard size doors 1-3/8" to 1-3/4" thick, adjustable latch backset from 2-3/8" to 2-3/4" with just a twist during installation. BOX INCLUDES: Exterior Keyed Door Lever, Interior Lever, Adjustable Latch, Intallation Hardware, SmartKey Tool, 2 Keys, Install Guide. WARRANTY PROTECTION: Our products are backed by a lifetime mechanical and finish warranty with great customer service, see Kwikset warranty for more detail