bolt 46 since the hub boss 114 passes freely through the open slot 146 in the slide plate 142 if the mortise lock is reversed for installation in a door of the opposite hand the screw 154 is simply moved to the opposite rear tab 148 of course in mortise locks using a single hub the screw prevents rotation of both operators similarly in the illustrated embodiment a second stop screw can be used with the same effect the locking mechanism is unlocked by depressing the lower end of the toggle 52 thereby moving the slide toward the front wall 42 of the case 32 and away from the hubs 108 fig2 and 21 preferably the mortise lock assembly includes the deadbolt 48 and the auxiliary bolt 50 the deadbolt 48 is selectively moved between an extended position and retracted position by operation of a key cylinder or thumb turn not shown in a conventional manner the cylinder and thumb turn rotate a deadbolt lever 156 which engages the sides of a slot 158 in the rearward end 160 of the deadbolt 48 for extending or retracting the deadbolt the upper leg 138 of the hub lever 128 has a second laterally projecting tab 162 for engaging the deadbolt lever 156 when the deadbolt 48 is in the extended position for retracting the deadbolt along with the latch bolt 46 in response to rotation of either hub 108 fig2 a rotating stop lever 164 is provided for functionally connecting the deadbolt lever 156 and locking mechanism fig2 the lower end 166 of the stop lever 164 is positioned in a slot 168 in the stop plate 142 and the upper end 170 is arranged in the path.