A Guide to Modern Lock Types

A single-cylinder deadbolt is still the most widely recommended lock for exterior residential doors, and for good reason. When properly installed, the bolt extends a full inch into the door frame's strike plate, resisting kick-in and pry attacks far better than a standard spring latch. The key phrase there is 'properly installed' — a deadbolt mounted in a weak door frame or with a flimsy two-screw strike plate loses most of its advantage. If you're unsure about your current setup, have a locksmith check the reinforcement behind that plate.

Double-cylinder deadbolts — which require a key on both sides — add a layer of security on doors with nearby glass panels, since a burglar can't simply break the glass and reach in to turn a thumb-turn. The trade-off is a real safety concern: in a fire or emergency, anyone inside needs to locate a key to get out. Building codes in many municipalities restrict or require specific labeling for double-cylinder locks. In the Five Towns and Rockaways area, it's worth confirming local code compliance before installing one. For most homes, a quality Grade 1 or Grade 2 single-cylinder deadbolt with a reinforced strike plate is the practical sweet spot.

Doorknob locks and lever-handle locks are everywhere — on bedroom doors, interior offices, and unfortunately on many exterior doors where they really shouldn't be the primary security device. The locking mechanism in a knob is built into the knob itself, which means the lock can often be defeated simply by snapping or gripping the knob with enough force. Levers are slightly more secure in construction but share the same vulnerability. Neither should ever be your only line of defense on an exterior entry point.

That said, knob and lever locks serve a legitimate purpose on interior doors where privacy rather than security is the goal — a home office, a medication cabinet room, or a bathroom. For exterior doors, pair them with a deadbolt above, and consider them the secondary lock. If your front or side door currently relies on a knob lock alone, upgrading to a deadbolt is one of the highest-value security improvements you can make for the cost.

Smart locks have moved well beyond novelty status. Modern options from brands like Schlage Encode, Yale Assure, and August Smart Lock Pro offer keypad entry, Bluetooth or Wi-Fi connectivity, app control, access logs, and temporary code generation — genuinely useful features for households juggling housekeepers, dog walkers, family members, or short-term rental guests. The better models are built on the same deadbolt mechanism as traditional locks and carry ANSI Grade 1 ratings, so the underlying security is solid.

The realistic concerns with smart locks are worth naming honestly. Battery failure is the most common issue — most smart locks will alert you when batteries run low, and nearly all include a physical key override or a 9-volt emergency terminal on the exterior. Connectivity vulnerabilities exist but are largely theoretical for consumer-grade residential use; the far more common breach is still physical, not digital. Installation matters too: a smart lock on a poorly reinforced door frame is no safer than a traditional deadbolt on the same frame. If you're adding a smart lock to a rental property near JFK or a home in Hewlett, make sure the door prep and frame are solid first.

Standalone keypad locks — the kind that use a PIN without any app or Wi-Fi — occupy a useful middle ground between traditional and smart locks. They eliminate the lost-key problem entirely, allow easy code changes when needed, and tend to be more affordable than full smart-lock systems. Many property managers in high-turnover rental areas choose them specifically because tenant transitions don't require rekeying — just a code reset. Grade 1-rated keypad deadbolts from manufacturers like Kwikset and Schlage are widely available and durable.

The main limitation is the lack of an audit trail and remote access — you can't check who entered and when from your phone, and you can't let someone in remotely. Codes can also be compromised if the same digits are used repeatedly and the buttons show wear. Rotating codes periodically and opting for backlit keypads that disguise button wear are simple best practices. For garages and sheds, heavy-duty combination padlocks from brands like Master Lock's commercial line or ABUS offer solid outdoor performance without any electronics.

High-security locks — most notably Medeco, Mul-T-Lock, and ASSA Abloy — are engineered to resist the attack methods that defeat ordinary locks: picking, bumping, and key duplication. Medeco cylinders, for example, use angled and rotating pins that require a specially cut key to align, making picking exponentially harder. Keys for these systems are patented and can only be duplicated at authorized dealers, which matters if you're managing access across multiple people. These locks also typically feature hardened steel inserts to resist drilling.

The trade-off is cost — both for the hardware itself and for any future key duplication — and the fact that they still need proper installation and a strong door to realize their potential. For most single-family homes in the Rockaways or South Shore communities, a Grade 1 deadbolt with a reinforced strike plate covers the realistic threat landscape well. High-security cylinders make the most sense for businesses, jewelry storage, home offices with sensitive materials, or property owners who want to meaningfully close the key-duplication vulnerability. A locksmith can assess your specific situation and recommend whether the investment is warranted.