The yale pm236 2 lever bathroom mortice sashlock offers a standard level of security and are suitable for use on internal timber doors the deadbolt is locked or unlocked not by key but using a separate handle set not supplied from either side these sashlocks also have a 125mm deadbolt and are suitable for use on bathroom doors or other internal doors where privacy is required a deadlock has a single deadbolt which is locked or unlocked and locked by means of a key from either side whereas a sash