Ask a locksmith for the best single security upgrade for a home and the answer is usually a quality deadbolt. Here is how a deadbolt works, how it beats the spring latch on most knobs, and what to look for when you install or upgrade one in a Texas house, where summer heat and humidity can swell a door and make a bolt stick.
What Is a Deadbolt Lock?
A deadbolt is a locking mechanism where a solid metal bolt, typically hardened steel, extends directly into the door frame when locked. Unlike a spring latch, the deadbolt has no spring mechanism. It only moves when you physically turn a key or thumb turn. That single design difference is what makes deadbolts significantly more resistant to forced entry.
The bolt itself is usually one inch long when fully extended, and it seats into a strike plate mounted in the door frame. On a properly installed deadbolt, the bolt seats in the strike plate and long screws carry the force into the wall stud behind the frame, making it much harder to kick or pry open.
Single Cylinder vs Double Cylinder Deadbolts
This is one of the most common questions homeowners ask when shopping for a deadbolt. Here’s how they differ:
Single Cylinder Deadbolt
A single cylinder deadbolt has a keyed cylinder on the exterior side and a thumb turn on the interior side. This is the standard configuration used in most homes. You lock and unlock from the outside with a key; from the inside, you simply turn the thumb turn with your hand. No key required to exit.
Single cylinder deadbolts are appropriate for most Austin homes. They’re convenient, meet most building codes, and provide strong security.
Double Cylinder Deadbolt
A double cylinder deadbolt requires a key on both sides. There is no thumb turn. You need a key to unlock from inside and outside.
Double cylinder deadbolts are sometimes recommended for doors that have glass panels near the lock, because a standard single cylinder deadbolt could be reached and turned from inside if someone broke the glass. With a double cylinder, that attack path is blocked.
The trade-off is real. In a fire or emergency requiring fast exit, a double cylinder deadbolt creates a serious risk if the key isn’t immediately accessible. Texas fire codes have specific requirements in certain occupancy types. Many residential codes require the main exit door to open from inside without a key, which rules out a double cylinder deadbolt on that door, and a key on a hook is not an accepted workaround. Ask your local building department before you install one.
How a Deadbolt Works: The Mechanism
When you turn a key in a deadbolt cylinder, you’re rotating a cam inside the lock. That cam is connected to a tailpiece that drives the bolt horizontally. As the cam rotates, it pushes the bolt outward (locking) or retracts it (unlocking).
The bolt is made of hardened steel and extends fully one inch into the strike plate when locked. Quality deadbolts, certified by BHMA for security, use anti-pick pins inside the cylinder, hardened steel inserts in the bolt to resist sawing, and a rotating anti-drill plate around the cylinder face.
This is how a deadbolt mechanism differs from a door knob’s spring latch:
| Feature | Deadbolt | Spring Latch |
|---|---|---|
| Bolt type | Solid, driven by key/thumb turn | Spring-loaded, angled |
| Retracted by | Key or thumb turn only | Turning the knob or pressing |
| Susceptible to credit card attack | No | Yes |
| Susceptible to shimming | No | Yes |
| Typical security rating | High | Low-Medium |
Why a Deadbolt Is More Secure Than a Spring Latch
A spring latch, the one you’ll find on most door knobs, is beveled on one face. That bevel lets the door close without a key: the latch compresses as the door closes, then springs back out once it clears the strike plate. This convenience comes at a security cost.
Because the latch is spring-loaded and angled, it can be manipulated from outside with a thin card, a shim, or a loidal tool slipped between the door and the frame. This is called “credit card attacking” and it can be done in seconds by someone who knows what they’re doing.
A deadbolt has no spring. The bolt does not move without deliberate actuation: a key in the cylinder or a hand on the thumb turn. There is no bevel to exploit, no spring to compress. Combined with proper installation (a reinforced strike plate with 3-inch screws into the stud), a quality deadbolt is among the most effective upgrades you can make to a residential door.
When Should You Install or Upgrade a Deadbolt?
Consider installing or upgrading a deadbolt in these situations:
Moving into a new home or apartment. Previous tenants or owners may have copies of existing keys. Rekeying the deadbolt or installing a new one is a direct way to establish control of who has access.
After a break-in attempt or burglary. If an intruder has targeted your home, your existing hardware has been assessed. Upgrade immediately.
Your current deadbolt is more than 10 years old. Older locks may have worn cylinders that can be picked or have weakened bolts from repeated use.
Your strike plate is installed with short screws. This is a common security weakness. A strike plate held by half-inch screws can be kicked out in one blow. Three-inch screws into the stud frame are the standard we recommend.
You’re renting and want additional security. Texas Property Code Section 92.153 requires a landlord to equip each exterior door of a rental dwelling with a knob lock or a keyed deadbolt, plus a keyless bolting device and a door viewer, at the landlord’s cost, subject to listed exceptions. If yours is missing or broken, ask your landlord in writing. This is general information, not legal advice.
What Does Deadbolt Installation Cost in Austin?
WOW Locks’ published rate for a new deadbolt or doorknob installation is $90 for the work, before tax. Hardware is additional if we supply it, so the lock you choose changes the total. Other things that can change the final number:
- The deadbolt hardware itself
- Drilling or retrofitting the door if needed
- A reinforced strike plate with 3-inch screws
- Key duplication if requested
If you’re upgrading an existing deadbolt with a new one of the same size, installation is simpler. If you’re converting a door that previously only had a spring latch and a new bore hole is required, expect extra time and cost for the additional work. See the deadbolt installation service and the pricing page.
WOW Locks quotes deadbolt installation before any work begins, and every add-on is quoted on the call before dispatch.
What to Look for in a Quality Deadbolt
Not all deadbolts are equal. When selecting one, look for:
A BHMA security certification. The Builders Hardware Manufacturers Association (BHMA) certifies residential deadbolts with a letter for security, durability and finish: A is the best, then B, then C. Look for the highest letter you can get on the security rating. The numbered Grade 1 to 3 ratings you may see on other hardware belong to different BHMA standards, so do not compare them with these letters.
Anti-pick pins. Security pin sets inside the cylinder that make picking substantially harder.
Anti-drill protection. A hardened steel plate or insert that prevents a drill from destroying the cylinder.
One-inch throw. The bolt should extend a full inch when locked. Shorter throws seat shallowly in the strike plate and offer less resistance to force.
Reinforced strike plate. The strike plate is as important as the lock itself. A quality installation includes a heavy-gauge strike plate with at least 3-inch screws.
Frequently Asked Questions
Can a deadbolt be picked?
Any lock can theoretically be picked given enough time and skill. Quality deadbolts with security pin sets are designed to make picking much harder. In practice, residential break-ins more often involve kicking, prying, or breaking glass than picking. A deadbolt properly installed with a reinforced strike plate addresses the kick-in attack effectively.
Is it possible to kick in a door with a deadbolt?
If the strike plate is installed with short screws, yes. A single well-placed kick can split the door frame and pull the strike plate free even with a quality deadbolt installed. The fix is a heavy-duty strike plate installed with 3-inch screws that reach the wall stud. When WOW Locks installs a deadbolt, we recommend a reinforced strike plate every time.
Can I install a deadbolt myself?
Deadbolt installation is within reach of a handy homeowner for a standard retrofit where the door already has the correct bore holes. It gets more complicated when a new bore hole is needed, the door is metal, or the frame needs reinforcement. Improper installation, particularly a misaligned bolt, creates a false sense of security. If you’re uncertain, a professional installation is worth the cost.
Does a deadbolt work on an apartment door?
Yes. Most apartment exterior doors are drilled for a deadbolt alongside the knob. In Texas, a landlord must equip each exterior door of a rental dwelling with a knob lock or a keyed deadbolt, plus a keyless bolting device and a door viewer, subject to listed exceptions (Texas Property Code Section 92.153). If your apartment does not have a working deadbolt, ask your landlord in writing. General information, not legal advice. Struggling with a sticking bolt in the heat? Read the deadbolt sticking guide. Choosing between a keypad deadbolt and a smart lock? See keypad deadbolt vs smart lock.
Get a Deadbolt Installed by WOW Locks in Austin
WOW Locks installs, repairs, and rekeys deadbolts across Austin and the surrounding metro area. WOW Locks LLC holds Texas DPS (TOPS) license B10595301, and every price is quoted before we start.
If you’re unsure what your door needs, call us and describe your setup. We’ll tell you exactly what we recommend before you commit to anything. Our residential locksmith team handles everything from standard deadbolt installs to full door hardware upgrades.
Call (844) 969-5625 for flat-rate deadbolt installation in Austin, TX.