The Master Lock electronic keypad deadbolt provides convenient keyless access and is easily programmed to store up to 20 different user codes. It is easy to use, six button keypad simplifies operation and is angled for easy viewing. Turn to lock or unlock, manual drive bolt extends battery life and assures the bolt is fully extended. It fits all doors, replaces all brands. Available in four popular finishes, Polished Brass, Antique Brass, Satin Nickel and Aged Bronze. Keyless convenience with backup keyed access. Easy to install with just a Phillips screwdriver. Ready to use with two factory preset codes. Programmer code protects against unauthorized programming. NightWatch deadbolt technology provides enhanced security for greater peace of mind. Select from two levels of security. Standard deadbolt security or click on NightWatch to lock out all keys, including lost or stolen keys for extra security. Also features BumpStop advanced cylinder technology. Specially engineered to resist bump attacks, one of the fastest growing security threats. Meets ANSI grade 2 standards. Four AAA batteries included.