MaxGrade MKPD15 Electronic Keypad Front Door Entry Deadbolt with Remote Fob, Satin Nickel Installs in standard 2 1/8" door prep - no additional holes to drill Auto-locking function enhances security and convenience 6 User Code capacity - user code can be 4 - 10 digits in length Easily programmed at the keypad - - programming code provided for each lock Operated by keypad or remote fob; 1 fob per lock. Mechanical key override