Deadbolts: The Core of Front-Door Security
A deadbolt is the single most important lock on your front door. Unlike spring-latch locks (found in doorknobs), a deadbolt extends a solid metal bolt into the door frame with no spring mechanism—someone can't slip it with a credit card.
Most residential deadbolts are single-cylinder (key outside, thumb-turn inside) or double-cylinder (key both sides). Single-cylinder is the standard choice; double-cylinder adds security if your door has glass nearby, but check local fire codes—some jurisdictions restrict them because they slow emergency exit.
Look for an ANSI/BHMA Grade 1 or Grade 2 rating. Grade 1 is commercial-grade (six strikes with a 75-pound force, 1 million cycles), Grade 2 is residential heavy-duty (five strikes, 800,000 cycles), and Grade 3 is builder-basic. A Grade 2 deadbolt with a one-inch throw bolt and a reinforced strike plate with three-inch screws will resist most kick-in attempts.
You can often rekey a deadbolt to match your existing keys rather than replace the entire lock—most pin-tumbler deadbolts can be rekeyed in minutes if the cylinder and keyway are compatible.
Doorknob and Lever-Handle Locks
Knob locks and lever-handle locks use a spring-latch mechanism. They're convenient for everyday entry and exit, but they should never be your only front-door lock—the latch retracts too easily under force.
Knobs are traditional and inexpensive, but they're tough for anyone with arthritis or limited hand strength. Lever handles meet ADA accessibility guidelines and are easier to operate with an armful of groceries.
Most modern front doors pair a knob or lever with a deadbolt above. The knob handles daily traffic; the deadbolt provides real security. If you're replacing hardware, confirm your door's backset (distance from door edge to the center of the bore hole)—standard residential is 2⅜ inches or 2¾ inches.
Handlesets: Style Plus Security
A handleset combines a decorative exterior handle (usually a grip or thumblatch) with an interior lever or knob, plus an integrated or separate deadbolt. They're the go-to for a polished front-entry look.
Handlesets come in two configurations: single-cylinder (one keyed lock that controls the deadbolt) or double-cylinder. The handle itself often operates a spring latch, while the keyed deadbolt delivers the real security.
Installation is more involved than a standalone deadbolt because you're mounting both the handleset and drilling for the deadbolt bore and latch. If you're upgrading from separate knob-and-deadbolt hardware, measure carefully—some handlesets require a longer or repositioned strike plate.
Quality handlesets carry ANSI/BHMA ratings just like deadbolts. Expect to pay more for a Grade 1 or Grade 2 set, but the durability and resistance to forced entry are worth it.
Smart Locks and Keyless Entry
Smart locks replace or augment your deadbolt with electronic access—keypad codes, smartphone apps, fingerprint readers, or key-fob proximity. No physical key means no lockouts from lost keys, and you can issue temporary codes to guests or contractors.
Most retrofit smart deadbolts keep the existing exterior key cylinder (so you have a backup) and replace only the interior thumb-turn with a motorized mechanism and battery pack. Installation backset and bore dimensions match standard deadbolts, so swapping is straightforward if your door prep is already cut.
Battery life ranges from six months to two years depending on usage and connectivity (Wi-Fi drains faster than Bluetooth or Z-Wave). Many models alert you when the battery is low, and most include a external jump-start terminal or mechanical key override.
Look for ANSI/BHMA Grade 1 or 2 certification even on smart locks—the electronics should not compromise the bolt strength or strike resistance. Pair any smart lock with a reinforced strike plate and three-inch mounting screws; the convenience is meaningless if someone can still kick in the frame.
Keyless Keypad and Combination Locks
If you want keyless entry without Wi-Fi or smartphone apps, a mechanical or electronic keypad deadbolt is a solid middle ground. You punch in a code, the bolt retracts, and you're in—no key, no phone.
Mechanical keypad locks use internal gears and levers; they never need batteries and can't be hacked remotely. Electronic keypad locks run on batteries (usually four AA) and often let you program multiple user codes, which is handy for families or Airbnb hosts.
Combination locks (dial or push-button) work the same way but typically have a single fixed code. Rekeying means disassembling the lock and resetting internal pins or wafers—not as quick as rekeying a pin-tumbler cylinder.
Installation is identical to a standard deadbolt. Just confirm your door thickness; some keypad bodies are bulkier and won't fit doors thinner than 1⅜ inches or thicker than 1¾ inches without an adapter kit.
Mortise Locks: Heavy-Duty and Commercial-Grade
A mortise lock sits inside a rectangular pocket (mortise) cut into the door edge, rather than two round bores. You'll see them on older homes, apartment buildings, and commercial entries—they're bulkier and more complex than cylindrical deadbolts, but they're also stronger.
Mortise locks integrate a deadbolt, latch, and often a lever or knob into a single lockset. Because the entire mechanism is recessed into the door, forced entry requires breaking the door itself, not just splintering the frame around a strike plate.
Replacing a mortise lock usually means finding a unit with the same case dimensions and faceplate width, or cutting a new mortise—both jobs are easier with a professional. Mobile locksmith service includes mortise lock replacement and repair; we carry common sizes and can fabricate custom strike plates on-site.
Most mortise locks use interchangeable cores (IC or SFIC), which makes rekeying fast—you swap the cylinder core in seconds without removing the lock body.
Choosing the Best Front Door Lock for Your Home
Start with a Grade 1 or Grade 2 deadbolt as your baseline—everything else is secondary. If you need a handleset for curb appeal, make sure it includes or pairs with a rated deadbolt, not just a spring latch.
Consider who uses the door. Households with kids, elderly parents, or frequent guests benefit from keypad or smart locks. If you live alone and want maximum simplicity, a high-security mechanical deadbolt and a backup key left with a trusted neighbor may be all you need.
Don't forget the frame. Even a Grade 1 deadbolt fails if the strike plate is held by half-inch screws in soft pine trim. Use a reinforced strike plate with screws that reach the wall stud—typically three inches long. Some strike plates include a steel box (strike box) that encases the bolt entirely.
If you're unsure which lock fits your door prep, backset, or security needs, a licensed locksmith can measure on-site, explain your options, and install everything correctly the first time. Check out our blog for more tips on lock maintenance, rekeying, and smart-lock setup.