Your deadbolt is the single most important piece of hardware on your front door — and most homes have a cheaper one than they should. If you are buying a new lock or upgrading your home security, here is exactly what to look for, in plain English.
Why the deadbolt matters most
A doorknob lock is mainly for convenience; the deadbolt is what actually resists a break-in. The vast majority of forced entries are simple kick-ins, so the strength of your deadbolt and how it is anchored to the door frame is what stands between an intruder and your home.
ANSI/BHMA grades, explained
Deadbolts are rated by the ANSI/BHMA standard into three grades based on durability and security:
- Grade 1 — best. Commercial-level strength, the top residential rating. Recommended for exterior doors.
- Grade 2 — good. A solid mid-range choice that exceeds basic residential needs.
- Grade 3 — basic. Meets only minimum residential security. Fine for an interior door, not ideal for your front door.
Look for the grade on the packaging. For exterior doors, aim for Grade 1.
Single vs. double cylinder
Single cylinder deadbolts have a key on the outside and a thumbturn inside — the standard, and the safer choice for fast exit in an emergency. Double cylinder deadbolts need a key on both sides, which helps if there is glass near the lock (an intruder cannot reach in and turn it), but they can be dangerous in a fire because you need a key to get out. For most homes, single cylinder is the right call.
Features that actually matter
- One-inch bolt throw. A longer bolt seats deeper into the frame.
- Reinforced strike plate with three-inch screws driven into the wall stud — this is what stops kick-ins.
- Anti-drill and anti-pick cylinders on higher-security models.
- Solid metal construction rather than thin pot-metal.
What about smart deadbolts?
Quality smart deadbolts combine a strong physical bolt with keypad or app entry. The key is to choose one with a real Grade 1 or 2 bolt underneath — the smart features are only as secure as the lock they are bolted to. We cover this in our smart lock installation service.
Installation matters as much as the lock
Even a Grade 1 deadbolt underperforms if the strike plate is screwed into thin trim instead of the frame, or the bolt does not fully extend. We install and upgrade deadbolts properly across Staten Island — see our deadbolt installation page or our broader residential locksmith services.
Frequently Asked Questions
What is the most secure grade of deadbolt?
ANSI/BHMA Grade 1 is the highest residential security rating and is what we recommend for exterior doors. Grade 2 is a solid mid-range option, and Grade 3 meets only basic residential security. For your front door, a Grade 1 deadbolt with a one-inch bolt throw and a reinforced strike plate offers the best protection.
Should I get a single or double cylinder deadbolt?
A single cylinder (key outside, thumbturn inside) is best for most homes and is the safer choice if your door has glass nearby, because you can always exit quickly in an emergency. A double cylinder (key on both sides) adds security against break-ins through glass but can trap people inside during a fire, so check local fire-safety guidance before choosing one.
Does a better deadbolt really stop break-ins?
It helps a lot. Most forced entries are kick-ins that defeat the strike plate, not the lock itself. A Grade 1 deadbolt with a one-inch throw and a reinforced strike plate secured with long screws into the door frame dramatically increases how much force a door can take.
Can you install a new deadbolt for me on Staten Island?
Yes. We install and upgrade deadbolts across Staten Island, fit reinforced strike plates, and make sure the bolt seats properly so the lock actually performs. We confirm the price up front, with a flat $29 service call.
Upgrade your deadbolt the right way.
Call (347) 472-500824/7 across Staten Island · Licensed, bonded & insured · Flat $29 service call
Related Rescue Locksmith Services in Staten Island
Need a locksmith now? Rescue Locksmith provides 24/7 emergency lockout service, car key replacement and fob programming, and commercial locksmith services for businesses across Staten Island. Call (347) 472-5008 for fast, licensed, insured help.