Door Knob Lock vs. Deadbolt: How to Actually Secure Your Front Door

A door knob lock — also called a knob lock — uses a spring-loaded latch bolt that retracts automatically when you turn the knob. That mechanism is convenient, but it's also its biggest weakness. Because the latch is angled and spring-loaded, it can be defeated with a credit card or a bump shim in seconds on many older or lower-grade installations. The lock cylinder inside a standard door knob with lock is typically smaller than a deadbolt cylinder, which means it offers less resistance to picking and drilling as well. For these reasons, building codes in most U.S. jurisdictions — including South Carolina — do not consider a knob lock alone to be a primary security device for an exterior door.

That said, a door knob with lock and key still plays an important role in your overall system. It keeps the door positively latched, adds a secondary barrier, and provides convenience for everyday entry. The mistake is treating it as your only line of defense rather than one layer in a stack. If your exterior door currently has only a knob lock, that's the first thing to address.

A deadbolt throws a solid steel bolt — typically 1 inch — directly into the door frame's strike plate when you turn the key or thumb turn. Because there's no spring mechanism to manipulate and the bolt itself doesn't retract under lateral pressure, a properly installed deadbolt resists shimming, most kick-in attempts, and basic picking far better than a knob lock alone. The critical word there is 'properly installed.' A deadbolt anchored to a flimsy strike plate with short screws offers almost no real protection — a determined kick will pull the screws right out of the soft wood of the door jamb. The fix is a reinforced strike plate secured with 3-inch screws that reach the structural framing behind the jamb, not just the trim.

Single-cylinder deadbolts (keyed outside, thumb turn inside) are the standard choice for most Graniteville homes. Double-cylinder deadbolts (keyed on both sides) are sometimes used on doors with glass panels nearby, but they come with a serious safety trade-off: in a fire or emergency, you need a key to get out. If you're considering a double-cylinder unit, talk through that trade-off with a professional before making the decision. A trained locksmith can walk you through the right deadbolt grade for your specific door and frame, because not every product on the hardware store shelf is built to the same standard.

If you want the most robust single-lock solution available — and you're willing to invest in it — a mortise lock is worth serious consideration. Unlike a cylindrical knob lock or a standard deadbolt that mounts to the surface of the door, a mortise lock is a complete lock body that installs inside a precisely routed pocket (the 'mortise') in the edge of the door. It combines a latch bolt and a dead bolt in one integrated unit, with a much larger, more complex cylinder mechanism. Mortise locks are the standard on commercial properties for good reason: they're significantly harder to pick, drill, or force than residential-grade cylindrical hardware, and the steel housing itself reinforces the door edge against spreading attacks.

Mortise lock installation is not a DIY project — it requires routing into the door edge with precision, and a mistake means a weakened door or a lock that doesn't align with the strike. Our team at Graniteville Locksmiths installs and services mortise locks for both residential and commercial clients across the Graniteville and North Augusta areas. If you're running a home-based business, managing a rental property on the outskirts of Aiken, or you simply want commercial locksmith-level hardware on your front door, a mortise lock installation is one of the highest-impact upgrades available. Call us at (803) 515-7077 to find out whether your current door and frame can accept a mortise lock, or whether a high-grade deadbolt is the smarter fit.

Security isn't just about the hardware — it's about controlling who can use it. Two of the most overlooked maintenance steps homeowners should take are rekeying locks after a move or after giving out keys, and changing access codes on keypad locks regularly. Knowing how to rekey a lock (or having it done professionally) is one of the simplest and most cost-effective security improvements you can make. Rekeying means a locksmith alters the pin configuration inside the existing lock cylinder so that old keys no longer work — you don't need to replace the whole lock. If you've just moved into a home in Graniteville, bought a rental property near the Aiken County line, or recently had a contractor, houseguest, or property manager with a key, rekeying is the right first step. Our team can rekey Schlage, Kwikset, and most other major cylinder brands quickly, on-site.

If your home uses a keypad door lock, knowing how to change the code on a keypad door lock is essential — and most homeowners do it far less often than they should. Codes should be changed whenever someone who knew the old code no longer needs access, after a break-in attempt in your neighborhood, or simply on a regular schedule (every six to twelve months is a reasonable baseline). The steps vary by brand and model, but generally involve entering a programming mode with a master code, entering the new user code, and confirming it. If you've lost the programming instructions or forgotten the master code and are locked out of the programming function — not the door itself — a professional locksmith can often reset the unit without replacing it. Similarly, if you're wondering 'can a locksmith come to my house?' to handle a keypad reset, code change, or full lock replacement, the answer is yes — mobile locksmith service means we come to you, wherever you are in the Graniteville area.

A well-secured residential front door in 2024 combines several elements working together: a quality door knob lock for everyday latching convenience, a Grade 1 or Grade 2 ANSI-rated deadbolt (or a mortise lock for maximum protection), a reinforced strike plate with long structural screws, a solid-core or steel door in a sturdy frame, and — if you want modern access control — a keypad or smart lock layer on top. No single product makes your door secure; the system does. A high-end deadbolt installed in a hollow-core door on a weak frame is still a weak door. A mortise lock on a solid door with a reinforced frame and a secondary knob lock is a genuinely difficult entry point.

One thing homeowners often ask about is whether certain techniques — like how to pick a door knob lock — are something they should know in case they're locked out. Our honest answer: for a legitimate lockout at your own home, the safest and fastest path is always to check for a spare key with a trusted neighbor, try other entry points you have legitimate access to, and then call a professional emergency locksmith rather than attempt to pick or force a lock yourself. Attempting to pick or bypass a lock without training typically results in a damaged cylinder or a broken key, which turns a simple lockout into a more involved (and more expensive) service call. If you're in a genuine lockout situation anywhere in Graniteville, North Augusta, or the surrounding Aiken County communities, call (803) 515-7077 — we're available 24/7 and will reach you as quickly as possible.

Graniteville Locksmiths is a 24/7 mobile locksmith operation rooted in the Graniteville area — which means we're already familiar with the roads, neighborhoods, and property types across this part of South Carolina. From the historic textile mill neighborhoods along Horse Creek in Graniteville proper, to the growing residential communities of North Augusta, to the established neighborhoods of Aiken, we serve homeowners, landlords, and business owners throughout the region. Our main locations include Graniteville, Aiken, North Augusta, and the surrounding cities and communities of Aiken County and the Central Savannah River Area.

Our services cover the full range of residential and commercial locksmith needs: residential deadbolt installation, door knob lock replacement, mortise lock installation and service, lock rekeying, master key system setup, keypad and smart lock installation, keypad code reprogramming, emergency lockout response, lock repair and maintenance, high-security lock upgrades, door frame and strike plate reinforcement, key duplication, broken key extraction, lock cylinder replacement, commercial door lock installation, commercial master key systems, commercial mortise lock service, access control system installation, mailbox lock replacement, garage door lock service, safe opening and combination changes, car lockout service, key fob programming, transponder key cutting, and ignition lock service. Whether you need a single rekeyed cylinder or a full commercial locksmith security assessment for a business property, our experienced team handles it.

A common question we hear is 'how much should a locksmith charge to change a lock?' or 'how much is the average locksmith charge?' — and the honest answer is that the final price depends on several specific factors: the type and grade of lock being installed or serviced (a basic knob lock replacement differs significantly from a mortise lock installation), the time of day (24/7 emergency service calls involve different logistics than a scheduled daytime appointment), travel distance to your location within the Graniteville service area, and whether any specialized parts need to be sourced. What we can promise is that we confirm an exact, up-front price before any work begins — you'll never face a surprise invoice at the end of a job. If you'd like a specific quote for a lock replacement, rekeying, mortise lock installation, or any other service, the fastest way to get one is to call (803) 515-7077 and describe what you need.