How to open a locked door that has a small hole in the doorknob

How to open a locked door that has a small hole in the doorknob door lock slot The mortise lock system comprises of products like multi pin bolt mortise lock, mortise lever lock, mortise lock for steel doors, mortise lever dead lock, door with round slot re4 W&F style mortise lock - face has round end with vertical slot when locked ​Squared off lock body with flat mounting plate Installed with 6-32 machine screw

door with round slot re4 hole saw to bore a hole through the door Once the center bit is through DeWalt Door Lock

door mail slot blocker Install The Door Lock by Yourself Easy to work #Lock Mortiser com  Wood Door Lock Slot Attachment Get Latest Price Call for Best Deal+91-8048372493 by:Saraswati Enterprise, Rajkot Product Specifications