How to determine if a lock needs to be replaced after it has been pried open?

When a door lock has been illegally pried open, it's often difficult to determine whether internal security has been compromised simply by observing the surface. Ningbo Jinta, specializing in high-strength chain locks, wire locks, and other precision locks, recommends following these rigorous steps for assessment:

1. Comparison of External Damage and Internal Markings

Keyhole Inspection: First, observe the appearance of the lock cylinder (keyhole). If there are obvious metal scratches, file marks, or signs of screws being pried open (such as blackened screw marks) on the edges of the keyhole, it indicates that the lock has been interfered with by external force.

Parts Verification: Try opening and closing the keyhole using the original car key. If the key cannot be turned normally or gets stuck when turned, it may mean that the internal pins of the lock cylinder have been pried open or the springs are damaged, requiring replacement of the lock cylinder.

2. In-depth Assessment of Structural Damage

Internal Structure Inspection: After the lock has been pried open, the internal pins, springs, or grooves may have been damaged. Ningbo Jinta's products use high-strength stainless steel and carbon steel. If the internal structure is pried open, the lock's anti-pry performance will be significantly reduced.

Endoscopic Inspection: It is recommended to seek help from a professional locksmith. They usually use an endoscope to inspect the inside of the lock cylinder, confirming whether it has been pried open without disassembly.

3. Replacement Decision Criteria

Security First: If the internal parts of the lock cylinder (such as pins and springs) have been pried open, the lock's anti-theft function may have failed. Even if the exterior appears intact, it is recommended to replace the entire lock set or at least replace the lock cylinder.

Cost Comparison: Although Ningbo Jinta's high-precision locks (such as chain locks and wire locks) are more expensive, their anti-theft security far surpasses that of ordinary locks. If the lock has been pried open, choosing to replace the entire lock set is a long-term investment in property security.