Pushbutton Lock M210-EZ-SC is a mechanical keyless digital combination deadbolt lock with Satin Chrome finish. The Pushbutton Lock is very easy and quick to install - installs in minutes with EZ plates. M210-EZ-SC do not requires batteries, wires, or AC/DC. One user code with thousands of possible combinations works as a lock key. To lock and unlock deadbolt, thumbturn on inside. Operates with simple turn of knob with long or short code of your choosing. Code can be 3-5 characters in length (a code with more or less characters requires a Tumbler Pack which is sold separately. The M210-EZ-SC has manually locking, adjustable latch backset and changeable handing. Pushbutton Lock M210-EZ-SC has top-notch construction — strong heavy quality, lock body made from durable zinc alloy, fits tight to door. Mounts in standard 2 1/8" hole.