The Emtek 2101US15 EMT 2101 US15 PASS POCKET DOOR LOCK is a keyless entry door lock that is compatible with most standard door handles This lock features a slim design that makes it easy to fit in any pocket or purse The Emtek 2101US15 EMT 2101 US15 PASS POCKET DOOR LOCK is also easy to use, requiring just a simple press of the button to lock or unlock the door