A quality deadbolt is your first line of defense against break-ins. The right deadbolt provides significantly more security than a standard door knob lock alone. Understanding deadbolt grades, types, and features helps you choose the best protection for your home.
Why Deadbolts Matter
Standard door knobs with built-in locks can often be bypassed with a credit card or basic tools. Deadbolts provide a solid metal bolt that extends into the door frame, requiring significantly more force to breach. Most burglars will move on to an easier target when faced with a quality deadbolt.
Understanding Deadbolt Grades
The American National Standards Institute (ANSI) and Builders Hardware Manufacturers Association (BHMA) rate deadbolts into three grades:
Grade 1 - Commercial/Heavy Duty Residential
- Highest security level
- Must withstand 10 strikes of 75 pounds of force
- 250,000 cycle tested
- Recommended for exterior doors on homes with high security needs
- Brands: Medeco, Mul-T-Lock, Schlage B-series
Grade 2 - Heavy Duty Residential
- Excellent security for homes
- Must withstand 5 strikes of 75 pounds of force
- 150,000 cycle tested
- Best balance of security and cost for most homes
- Brands: Schlage, Kwikset SmartKey, Yale
Grade 3 - Residential
- Basic residential security
- Must withstand 2 strikes of 75 pounds of force
- 100,000 cycle tested
- Suitable for interior doors or low-risk exterior applications
- Common on builder-grade installations
Our recommendation: For all exterior doors, install at least Grade 2 deadbolts. Grade 1 is ideal for high-value homes or higher-crime areas.
Types of Deadbolts
Single Cylinder Deadbolt
The most common type - uses a key on the outside and a thumb turn on the inside. Easy to operate in an emergency since you do not need a key to exit.
Double Cylinder Deadbolt
Requires a key on both sides. Provides extra security for doors with glass panels that a burglar could break to reach the thumb turn. However, they can be a fire hazard if you cannot find the key during an emergency exit.
Smart Deadbolts
Electronic deadbolts with keypad, fingerprint, or smartphone control. Offer convenience features like remote access and access logs while maintaining strong physical security.
Key Features to Look For
Bolt Length
The bolt should extend at least 1 inch into the door frame when locked. Shorter bolts are easier to pry or force.
Anti-Pick and Anti-Bump Protection
Quality deadbolts include features that resist lock picking and bump key attacks, including security pins, spool pins, or serrated pins.
Anti-Drill Protection
Hardened steel inserts in the bolt and cylinder housing prevent drilling attacks.
Reinforced Strike Plate
The strike plate is where the bolt enters the frame. A reinforced strike plate with 3-inch screws that reach the door frame stud significantly increases kick-in resistance.
Proper Installation Matters
Even the best deadbolt fails without proper installation:
- Use 3-inch screws in the strike plate to reach the frame stud
- Ensure proper alignment for smooth operation
- Check that the bolt extends fully without binding
- Verify the door and frame are solid and in good condition
Trusted Deadbolt Brands
Some of the most reliable deadbolt manufacturers include:
- Schlage: Wide range from Grade 3 to Grade 1, plus smart options
- Kwikset: Popular SmartKey technology allows easy rekeying
- Yale: Long history of quality residential and commercial locks
- Baldwin: Premium hardware with excellent build quality
- Medeco: High-security locks with patented key control
- Mul-T-Lock: Advanced high-security designs
