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 International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.