Ever once in a while I see someone (newb or experienced user) ask what and if there are security pins in a certain lock, I'm going to try and start a thread that could address some of the questions about locks with security pins and their locations. I'll start with pictures I have of an American lock clone I bought at Ace Hardware. Despite the generic Ace (hardware) brand name, this lock had quite a few security pins inside it. Including those cool serrated-spool pin hybrids.
The pins, left most stack is the first one the key touches when it goes in the lock:
The keyway, I couldn't seem to get a clear picture of this. Note how much it looks like the American keyway, same means of removing the cylinder too:
The key, same head as the American key:
The body, just so you know what lock I'm talking about:
.