5 pin tumbler locking mechanism. Anti-pick mushroom pins. Standard section keyway. Supplied with 3 nickel plated keys.
Advice from
Lock cylinder buying guide
"Oops! The key broke off in the lock on the front door" or "Help! My key won't turn in the lock!" Lock cylinders are a real minefield... half-cylinders, round, button, high security, 30x40... Stop! Let's get back to basics.