There are several types of key in the knob locks on the market. For the purpose of this drill we will review the Kwikset style locks. Kwikset style key in the knob locks can be identified by the entire lock cylinder being visible on the front of the knob, not just the key-way. Keeping through the lock theory in mind (remove the lock cylinder and replicate its action) we can reasonably expect that if we remove the cylinder we should be able to manipulate the locking device into the unlocked position.
The lock cylinder can be removed using a straight blade screwdriver to pry around the edge of the cylinder. There is a small clip on either side of the cylinder that hold it in place. The light prying force generated with the screwdriver is more than enough to pry the cylinder out.
Once the cylinder is removed look inside the knob and locate the stem that previously sat into the recess on the back of the cylinder. Turn this stem using a straight blade screw driver or a pair of pliers to unlock the lock. Once the lock has been manipulated you can turn the knob as you would normally.
This method of forcible entry is very quick (30 seconds or less) and creates very little damage if you know how to do it properly. I DO NOT let damage dictate my forcible entry tactics. I force entry if the quickest and most professional manner that is applicable to the given situation. If we are forcing entry into a building or area of a building then we must have reason to believe that there is some type of emergency requiring our services on the other side of that door. If this through the lock method fails for some reason you cannot walk away from the door and just say “oh well, I guess we are not getting in.” Having the irons available as a back up plan is always a must.
These and all techniques displayed by Brotherhood Instructors, LLC. are to be used only by emergency services personnel in the performance of their official duties.