First: How Locksmiths Open Locks
Before we get into what's hard to open, it helps to understand the methods a locksmith uses:
- Lock picking: Using specialized tools (tension wrench and picks) to manipulate the pins inside a lock cylinder to the correct positions. This is non-destructive — the lock works normally afterward.
- Bump keys: A specially-cut key that, when struck with a bump hammer, temporarily knocks all pins to the shear line. Many basic locks are vulnerable to bumping.
- Bypass tools: Specialized tools that reach around the lock mechanism entirely — for example, a tool that directly retracts the latch without engaging the lock at all.
- Impressioning: Inserting a blank key and turning it gently to create marks on the blank, then filing it until it becomes a working key. Time-consuming but non-destructive.
- Drilling: The last resort. Drilling a precise hole through the lock cylinder destroys the lock but opens the door. The lock must then be replaced.
A skilled locksmith will always try non-destructive methods first. Drilling is expensive for the customer (they need a new lock) and is only used when other methods fail or when time is critical.
Locks That Are Extremely Difficult to Pick
These locks are designed by their manufacturers to resist lock picking, bumping, and drilling. They're the hardest locks a locksmith will encounter:
Abloy Protec2
The Abloy Protec2 from Finland uses a disc-detainer mechanism instead of traditional pins. There are no springs and no pins to bump or pick in the conventional sense. The rotating disc system requires a completely different set of skills and tools. Most locksmiths consider this one of the hardest locks to pick non-destructively. It's also drill-resistant with hardened steel inserts.
Medeco M3 and X4
Medeco high-security locks use pins that must be both lifted to the correct height AND rotated to the correct angle. The M3 adds a slider mechanism that must also be positioned correctly. The X4 adds an electronic element — a chip in the key communicates with the lock. Picking requires manipulating three separate security layers simultaneously.
Mul-T-Lock MT5+
Mul-T-Lock uses telescoping pins — a pin inside a pin — that must both be set to the correct height. The MT5+ adds an interactive element that requires a specific key profile. The pin-in-pin design makes standard picking tools ineffective, and the lock has anti-drill and anti-bump protections built in.
EVVA MCS
The EVVA MCS (Magnetic Code System) from Austria uses magnets in the key instead of physical cuts. The lock has no keyway pins to pick — instead, magnetic rotors inside the cylinder respond to the magnets in the key. Without the correct magnetic configuration, there's nothing for a pick to engage with.
BiLock
BiLock uses a dual-sidebar mechanism where two separate rows of side pins must be aligned simultaneously. Standard lock picks simply cannot reach and manipulate both sidebars at once. The keyway is also extremely restricted, making tool insertion difficult.
Important Distinction
"Hard to pick" is not the same as "impossible to open." Even the most advanced locks can be drilled open. The question is whether the locksmith can open it non-destructively (lock survives) or destructively (lock needs replacement). High-security locks make non-destructive entry extremely difficult, but a skilled locksmith can still get you in.
Smart Locks and Electronic Locks
Smart locks present a different challenge. There are two categories:
Smart Locks WITH a Keyway
Most residential smart locks (Schlage Encode, Yale Assure, Kwikset Halo) have a physical key override. A locksmith can pick the mechanical keyway just like any other lock. The "smart" features are bypassed entirely.
Smart Locks WITHOUT a Keyway
Some smart locks (like August Smart Lock or certain Lockly models) have no physical key backup. If the electronics fail and you're locked out, the locksmith may need to remove the lock body, reset the system, or drill. This is more complex and costly.
For this reason, locksmiths typically recommend smart locks that include a physical key override. It gives you a failsafe that doesn't depend on batteries, Wi-Fi, or electronics. See our keyless entry guide for more on choosing the right smart lock.
Safes
Safe opening is a specialized skill. Most commercial locksmiths can open standard safes, but high-security safes require advanced techniques:
- Combination safes: A skilled locksmith can often "manipulate" a mechanical combination lock by feeling or listening for the gates in the wheel pack. This takes patience (sometimes hours) but opens the safe without damage.
- Digital/electronic safes: If the keypad fails or you've forgotten the code, most have a master override key or reset procedure. A locksmith with the right tools can access these.
- TL-rated safes: Safes rated TL-15 or TL-30 (Tool-Resistant for 15 or 30 minutes) are specifically designed to resist professional attacks. These require specialized drilling with carbide-tipped bits and can take hours to open. Some have glass relockers that trigger additional bolts if drilling is detected.
- Bank-grade vaults: TRTL-30 and TRTL-60 rated safes resist both tool and torch attacks. Opening these requires specialized training, equipment, and often multiple locksmiths working together. This is well beyond standard locksmith service.
Car Locks and Anti-Theft Systems
Modern vehicle locks present unique challenges for locksmiths:
- Standard car locks: Automotive locksmiths open these easily with specialized car opening tools. Most vehicles can be unlocked in under 5 minutes.
- Transponder systems: The transponder key communicates with the car's immobilizer. A locksmith can program new transponder keys with the right equipment — the same equipment dealers use.
- Proximity keys / push-button start: Some newer vehicles with advanced keyless entry systems require dealer-specific software to program replacement keys. A good locksmith will tell you upfront if your vehicle requires dealer service.
What This Means for Your Home Security
If you're reading this to decide what locks to install on your home, here are practical takeaways:
- A standard Kwikset or basic Schlage deadbolt can be picked in under a minute by a skilled person. These locks keep honest people out but won't stop a determined intruder with basic tools.
- A mid-range Schlage B60N or similar offers much better pick resistance and bump resistance. This is the sweet spot for most residential applications in Miami.
- High-security locks (Medeco, Mul-T-Lock) are the gold standard for homes and businesses that need maximum protection. They resist picking, bumping, drilling, and unauthorized key duplication.
Remember that lock security is just one layer. Door frame reinforcement, proper strike plates with 3-inch screws, and good lighting around entry points are equally important. See our home security guide for a complete approach.
The Bottom Line
A professional locksmith can open any lock — the question is whether it can be done non-destructively. Standard residential locks take minutes. High-security locks may take longer and may require drilling. The most important thing is to call a licensed, professional locksmith who uses the right techniques and doesn't jump to drilling as a first option.
Need help with a lock — any lock? Call 305 Locksmith at (305) 539-0439. We'll assess your situation and use the least destructive method to get you in.
Paul M.
Master Locksmith / Owner
Owner of 305 Locksmith with over 10 years of experience in residential, commercial, and automotive security across Miami-Dade County. Licensed, bonded, and insured. Member of ALOA (Associated Locksmiths of America).