Safe Manipulation and Drilling Decision
A customer has a small floor safe with a mechanical combination lock. The safe is a SentrySafe model with a 3-number combination and a tubular key lock for the handle? Actually, it's a floor safe with a dial combination and a key lock? The customer has lost the combination and the key. The safe contains important documents. The safe is bolted to the floor. The customer wants you to open it without damaging the contents. You are a locksmith with safe opening experience. You have manipulation tools, a stethoscope, and drilling equipment. The safe is a lower-end model, likely with a Group 2 combination lock. The customer is willing to pay for manipulation but wants it done quickly. You estimate that manipulation could take several hours and may not be successful, while drilling could be faster but risks damaging the lock and requiring replacement.
1. What factors would you consider in deciding whether to manipulate or drill the safe, and what would you recommend to the customer?
Read the worked answer
Factors: Safe type and lock quality (Group 2 locks are moderately resistant to manipulation), time available, cost, risk of damage to contents, customer's budget, and your own skill and success rate. Manipulation is non-destructive but time-consuming and not guaranteed. Drilling is faster but requires precise knowledge of the lock's internal layout to avoid damaging the safe's contents or the lock beyond repair. For a lower-end safe, drilling may be easier and the lock can be replaced. However, if the safe is bolted to the floor and the customer wants to avoid damage, manipulation is preferable. Recommend manipulation first if time permits, with a clear estimate and no guarantee. If manipulation fails, then drill. Obtain customer consent for both approaches and explain the risks. Also, check for any known vulnerabilities (e.g., default combinations, key override).
2. If you decide to drill, what steps would you take to minimize damage and ensure a successful opening?
Read the worked answer
Research the safe model and lock type to determine the drill point. Use a drill guide or template if available. Drill at the correct angle and depth to reach the lock mechanism without hitting the contents. Use a borescope to inspect. Once open, replace the lock with a new one and repair the hole. Document the process. Ensure you have the customer's authorization and that you are not violating any laws. After opening, provide the customer with a new combination and key.