When you don't pay attention, recommendations

This probably won’t help you at all.
But I’ll give the info.
I’m not sure about the one on the left.
But the one on the right could be “re keyed” by you.
That clip comes off.
The tumblers are a series of different height two piece pins each on a spring.
Where the two piece pin splits determines it’s height in its respective hole.
That’s why your key has high and low points.
It has to push each two piece pin just the right height to allow the lock core to turn inside the housing.
What this means is that if some has a bad sticky cylinder (like I did) he can swap the pins into a good cylinder.