Stop Lock is a steel lock with an internal alarm, ink burst panel, and motion sensor that are triggered if the lock is tampered with or forcefully breached. Locker thefts are a persistent problem, whether in the gym, pool, or break room, but most locks are easily defeated by bolt cutters or shimming locks. Stop Lock features hardened security features, including a loud alarm and exploding bright dye pack that deploy if the lock is broken to effectively protect sensitive and valuable items. Stop Lock can only be locked and unlocked via the biometric fingerprint scanner or the linked app, which can also alert users if the lock is tampered with or if the lock is moved.