No firearm's safety or lock can be a substitute for safe, careful gun handling and storage. Gun locks are intended to discourage unauthorized access to a firearm, particularly by young children.
If you have a gun at home, be sure to:
Keep the gun unloaded and locked up in a cabinet, safe, gun vault, or storage case.
Lock the bullets in a place separate from the gun.
Consider using a gun lock (a lock that makes the gun unable to fire).
Hide the keys (or passcode) to the locked storage.