Yale Assure Lock SL - Key-Free Touchscreen Door Lock in Satin Nickel, Lose your keys, for good: Unlock your door using your entry code on the keypad, and leave the bulky keychain behind. For use with your smartphone or smart home system, Yale Access Upgrade Kit is required (sold separately)., Auto-Lock for peace of mind: You didn’t forget to lock the door, your lock did it for you. Rest easy knowing that your door is locked every time you leave the house and when you go to bed at night., Easy to install on any door: Not so handy, Not a problem. Yale Assure locks are super easy to install and are guaranteed to fit standard doors (doors 1-3/8” to 2-¼” thick)., Stop hiding keys: Sharing codes is the new hide-a-key. Give unique codes to friends, family, and other people you trust, and never put a key under the doormat again., Upgrade to Wi-Fi with Yale Access: Use just the keypad for now, and upgrade to a smart lock whenever you’re ready. Our Yale Access Upgrade Kit (sold separately) lets you use your phone as your key., ,