What Is a Deadbolt?

Pick the right lock for your doors

Woman greets little girl at front door
Photo: gradyreese / E+ / Getty Images
Woman greets little girl at front door
Photo: gradyreese / E+ / Getty Images
Get quotes from up to 3 pros!
Enter a zip below and get matched to top-rated pros near you.
Geo Icon

Deadbolts are commonly used on exterior doors, and many families sleep more soundly and securely knowing they have one installed. 

Installing a deadbolt lock has many benefits. Still, you need to determine if it makes sense for your household before buying one. There are many different deadbolt locks on the market, and you can see which one is the best fit for you.

Single-Cylinder Deadbolt

A single-cylinder deadbolt lock has a thumb-turn lock inside, and the outside has a keyhole for locking and unlocking. This type of deadbolt secures your home with a simple turn of a knob, making them quick to lock and unlock when coming and going.

Double-Cylinder Deadbolt

The double-cylinder deadbolt requires a key on both sides. So when you lock the door from the inside, you need to use a key for added protection. 

Keyless Locks

There are two popular keyless lock types on the market: keypad locks and smart locks.

Keypad locks require a numerical code to lock and unlock. Smart locks use Wi-Fi networks to lock and unlock the door wirelessly. No keys? No problem. 

They're also convenient and efficient if you have dog walkers or babysitters who need access to your home. You won't have to give away multiple sets of keys!

Deadbolt Grades

The Builder's Hardware Manufacturers (BHMA) created the American National Standards Institute (ANSI) grading system for deadbolts. This grading scale ranges from 1 to 3, with 1 representing the highest grade and most secure locks and 3 representing the lowest grade. This system takes into account the lock's longevity, toughness, and latch length.

Grade 3

These deadbolts are tested to withstand 800,000 openings and closings. They have a five-eighths-inch latch bolt and will hold up against two strikes of 75 pounds of force. They're graded the least secure of the three grades.

Grade 2

Deadbolts in this category are nearly identical to grade 3 deadbolts. They have the same test openings and closings, and the same latch bolt size. The distinction is that these deadbolts can withstand five blows of 75 pounds of force.

Grade 1

These are the most secure deadbolts and are often used in warehouses to secure doors and windows. The latch bolt is a whole inch long, and the deadbolts receive one million openings and closures before approval. These deadbolts can endure 10 strikes from 75 pounds of force.

Benefits of Deadbolt Locks

Father walks through front door with son and daughter
Photo: Getty Images 1154943259 / iStock / Getty Images

According to locksmiths, deadbolts are the key to home security. Here are some benefits of having a deadbolt installed:

Protected Entry

According to the FBI’s Uniform Crime Reporting (UCR), in 2019, 55.7% of burglaries involved forcible entry. Deadbolt locks provide a much tighter seal for your doorframe and are made from machined steel, making them more durable than traditional locks. The key takeaway is it’s better to have a protective barrier to help deter burglars than the bare minimum.

Inexpensive Options

The cost of a deadbolt lock and installation depends on the lock you choose. Deadbolts are inexpensive and can cost anywhere from $10 to $45. In contrast, smart locks cost upwards of $100. You can install a lock on your own, or a local locksmith charges around $135 to $145. Depending on the type of deadbolt you choose, you can expect to pay $145 to $245 for labor and the locking mechanism. The cost to change your existing locks can vary as well.  

Easy Installation

Deadbolts are quick and easy to install. A local locksmith will be able to install your deadbolt lock in one brief appointment. Hiring a locksmith costs $50 to $200 on average. 

Deadbolt Lock Disadvantages

Deadbolts are stronger and more difficult to compromise than other locks, but they’re not entirely impenetrable. Break-ins can still happen no matter which type of lock your doors have. 

The best thing you can do is to learn how to protect your home from burglary by taking steps like limiting spare keys you give away and installing an alarm system. You can also install a home security door and frame reinforcement kit to add an extra layer of protection to your door and frame.

Frequently Asked Questions

A deadbolt has a different design, construction, and security level than a regular lock. Regular locks are mostly used for interior doors around the home, like bedrooms and bathrooms, and they usually include a locking mechanism on the inside. While regular locks are easy to use and install, they provide little security. 

A deadbolt adds a layer of security and is most commonly used on exterior doors. The installation is typically more complicated, but they hold up to wear and tear.

A deadbolt lock is typically considered more secure than a regular lock based on its internal construction. Each deadbolt type has varying levels of security, ranging from withstanding a small amount of force to those that can take on multiple strikes and greater force. Regular locks provide little to no security and are typically used more for easy entry and simple installation.

Yes. Although smart deadbolts are more expensive than traditional ones, their flexibility and advanced security make them well worth the investment. With smartphone integration, biometric sensors, and keypads, you can unlock your door from anywhere and easily manage access for guests—no keys necessary. They also provide enhanced security with encryption and tamper alerts, minimizing risks like lost or duplicated keys. However, smart deadbolts aren’t perfect. They raise privacy concerns and can be a headache to install, but they offer an extra layer of convenience and protection that’s hard to ignore.

Need professional help with your project?
Get quotes from top-rated pros.
The homeowners guide to locksmith services
From average costs to expert advice, get all the answers you need to get your job done.
Mother embracing her children when coming home
Oct 11, 2024
Oct 11, 2024
Installing new door locks every seven years can make a home safer and possibly earn you a home insurance discount. Here’s how much it costs to change a lock.
Woman checks her phone while opening the deadbolt on door
Oct 3, 2024
Oct 3, 2024
How much it costs to install a deadbolt lock depends mainly on the type of hardware you purchase and whether you DIY or hire a professional locksmith.
A white front door
Oct 3, 2024
Oct 3, 2024
Locked out of your car or home? Need to rekey your house? Here’s how much a locksmith costs and what you need to know before calling one.
Woman arriving home
Oct 18, 2024
Oct 18, 2024
Learning how to change a door lock is simple. All you need are a few common tools, a few minutes of your time, and this handy step-by-step guide.
The exterior of a house with a wooden front door
Oct 16, 2024
Oct 16, 2024
Our guide walks you through how to rekey a lock in 11 easy steps, plus helps you decide when to rekey a lock and when to replace it.
A woman entering a pin to enter the house
Sep 30, 2024
Sep 30, 2024
Choosing between a smart lock and a regular lock? Use our handy guide to discover the key differences, pros, and cons so you can secure your home with confidence.
Share project details to get started.