Klaiviel wrote:First off let me say that I bought this lock after a recommendation that it was harder to pick than a Schlage, I was sadly disappointed. The Corbin Russwin 1000 Mortise I recieved is 7 pin; however, there are no security drivers and the lock was master keyed. I am removing the master wafers to make it more of a challenge. Anyways, during disassembly I noticed a part I have never seen in a lock before, they look like the smallest ball bearings you can imagine and they seemed to have been resting between the master wafer and driver pins in the #5 and #7 pin position. I found 3 total, any idea as to what they are and what their function is?
Construction keying. Common in many other brands as well. When the change key is rotated these bearings fall into a recess in the plug and there they remain. This effectively locks out the construction master by changing one depth in one position.
