Your standard brass house key sits half-seated in your front door deadbolt, its cuts aligned with the lock pins far enough to turn halfway but not enough to disengage the locking mechanism. You pushed it in without applying too much force when you got home from your evening run, so there’s no obvious bend or …
The key is in your hand and it did not turn. Spare Key Hook is for that key: the one that stuck, the spare you cannot tell apart, and which door it actually opens.
The Key That Stuck is the lock you are standing at. The Spare Copy is the copy in the drawer and the one you give someone. Which Door is labeling the keys so tomorrow is not a guess.
Each page finishes one key. A minute on the page is an illustrative example unless you are timing your own lock.
Your standard brass front door deadbolt key sits fully seated in its lock, no gap visible between its head and the lock face. You’ve wiggled it gently side to side, no give. There’s no visible debris blocking the keyway, and you confirmed you grabbed the right key off the Spare Key Hook by the entry …