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You mentioned not explaining the whole process but you did an awesome job of explaining how to master key Uriah. Always top notch content" Thanks!

First, I wanted to say that I liked your video (and some of your others I've watched that led me here). You mentioned that you weren't sure how many new possible keys your example had enabled, so I thought I would try to answer that in way that might help demystify it. Each master pin you added made it so that there would be 2 (rather than just 1) possible combinations of key cuts that would work for that position. So, by adding 3 master pins, you made 2 possibilities for position 1, 2 possibilities for position 2, and 2 possibilities for position 3. That makes 2x2x2=8 combinations that will work to unlock the cylinder--the original key and 7 additional combinations of key cuts. Using 0 to indicate the lack of use of the master pin in a position, and a 1 to indicate the use of a master pin in a position, the following list identifies the possibilities after the 3 master pins you added: 000 - unchanged - no pins different from original 100 - only first position making use of master pin 010 - only second position making use of master pin 001 - only third position making use of master pin 110 - first two positions making use of master pins 011 - second and third positions making use of master pins 101 - first and third positions making use of master pins 111 - first three positions making use of master pins Hope that helps anyone that was wondering about the number of key combinations enabled by adding master pins.

Oh , so the point is to remove the old master pins, to check the cylinder what is inside? It took me a couple of minutes but I get it ! :) Ok, nice video as always!

Good video. I might add to that that you might suggest that they check the top Pn to make sure it is the correct one for that particular chamber because sometimes it does matter if you have the right one in there in some lock manufactures it does make a difference that’s just something else that might go along with what you’re saying.

I work for an apartment building ,at times i gotta change key, soo the numbers on the key corrisponds to number of the pins??