EMI's Quik-Pik™ can open residential or office interior doors with the 'key-in-the knob's locks. It is also used in fire towers to slip spring latch locks.
 
The practical design makes the Quik-Pik™ work from either side of the door. If the door opens inward, insert the Quik-Pik™ in the back of the molding stop and retract the latch. For doors that open towards you, Quik-Pik™ is slipped in from above or below the latch point and jiggled and pulled to retract the latch. A protective sleeve is added for safety when not in use.
 
Size: 6 3/8" L x 7/8" W x 1/8" H