Yale Real Living Key Free Touchscreen Deadbolt in Satin Nickel (YRD240-NR-619) Unlock by entering your 4-8 digit PIN code on the backlit or using the touchscreen keypad. Create up to 25 unique PIN codes for friends and family Replaces existing deadbolt with just a screwdriver. Requires a face bore hole of 2-1/8", backset of 2-3/8" or 2-3/4". Fits on standard doors 1 3/8" to 2 1/4" thick Upgradeable to work with your smart home (including SmartThings and Wink) with Yale network module (sold separately) Key free means no keys to lose or share, no locksmiths and no pick and bump break-ins. The lock features a 9V battery back-up charger so you won't get locked out with a dead battery! Voted #1 Smart Door Lock brand for 2017 by CEPro