What Are the Different Types of Door Locks and Illustrations?

Door locks are core security hardware for residential homes, commercial buildings, office spaces and public facilities. Different door lock types feature unique mechanical structures, security levels and installation methods, designed for different door positions and usage frequencies. Choosing the correct door lock is critical for interior privacy, exterior anti-theft performance and long-term stable door operation. Understanding the classification, functional characteristics and standard installation steps of mainstream door locks helps builders, contractors and household users make accurate hardware matching decisions.

With 12 years of specialized door hardware manufacturing experience, Degol Hardware ranks among China’s top 50 professional door hardware manufacturers. Our factory has complete production and testing systems, and all door lock products pass rigorous durability, load-bearing and anti-corrosion tests with CE certification. Equipped with rich overseas trade experience, we provide standardized, high-security door lock solutions for global residential renovation and commercial engineering projects with stable quality and flexible customization.

To help users quickly distinguish different door lock types and complete accurate product selection and standard installation, Degol Hardware will introduce four common and practical door lock types widely used in architectural hardware: lever handle lock, deadbolt lock, door handle lock, and rim lock. We comprehensively analyze their unique structural features, applicable usage scenarios, core functional advantages and professional step-by-step installation methods, providing reliable reference for residential decoration, commercial engineering procurement and daily hardware replacement.

Lever Handle Lock

Lever handle lock is a popular integrated door lock that combines a long lever grip and internal lock body structure. Different from traditional round knobs, its lever-style handle provides a larger contact area for easier one-handed operation, suitable for frequent daily opening and closing. The internal lever mechanism delivers flexible rebound and stable locking performance, with diverse surface finishes including brushed stainless steel, matte black and polished chrome to match modern interior decoration styles.

Best Application Scenarios: Widely used for residential interior doors, hotel room doors, office doors, apartment interior doors and medium-frequency commercial passage doors. It balances comfortable operation, decorative aesthetics and basic privacy protection.

Standard Installation Steps

Step 1: Confirm the door thickness and pre-reserved lock hole size, remove old door hardware and clean the door panel slot to ensure a flat installation surface.

Step 2: Install the lock body into the side hole of the door panel, fix the latch plate with self-tapping screws, and ensure the lock tongue stretches and retracts flexibly without jamming.

Step 3: Align the internal and external lever handles with the spindle, penetrate the connecting shaft and fix the handle screws symmetrically to avoid shaking and offset.

Step 4: Mount the matching strike plate on the door frame, repeatedly test door closing, handle pressing and locking functions to ensure smooth operation.

Deadbolt Lock

Deadbolt lock is a high-security anti-theft lock hardware, different from ordinary spring latch locks. It adopts a solid thick bolt structure without elastic rebound, realizing rigid locking and anti-pick, anti-pry and anti-violence opening performance. The solid bolt can be fully embedded into the door frame, greatly improving overall door security. Most deadbolt locks support key unlocking from outside and manual rotary locking from inside, which is the most reliable auxiliary anti-theft hardware for exterior doors.

Best Application Scenarios: Family entrance doors, villa main doors, commercial storefront doors, office exterior doors, rental house entry doors and other spaces requiring high anti-theft security.

Standard Installation Steps

Step 1: Mark the installation height on the door panel according to the deadbolt specification, drill through holes for the lock cylinder and reserve a bolt slot on the door edge.

Step 2: Fix the deadbolt lock body inside the door slot, install and calibrate the lock cylinder position to ensure key insertion and rotation are smooth.

Step 3: Install the bolt fixing plate and door frame strike plate, adjust the position to ensure the solid bolt can fully extend into the frame hole.

Step 4: Test external key unlocking and internal rotary locking repeatedly, check whether the bolt is firmly locked without shaking, and confirm no gap or loose deviation when the door is closed.

Door Handle Lock

The conventional door handle lock is a universal integrated lock set combining round door knob and built-in lock body, belonging to the most versatile standard indoor lock hardware. It integrates push-pull opening and privacy locking functions, featuring simple structure, easy installation and low failure rate. This type of lock is lightweight, durable and highly adaptable, supporting multiple functional versions including passage, privacy and keyed entry types to meet diverse indoor needs.

Best Application Scenarios: Bedroom doors, bathroom doors, study doors, corridor auxiliary doors and various conventional indoor wooden doors and light metal doors.

Standard Installation Steps

Step 1: Remove the original door knob and latch, clean the door hole residues, and check whether the reserved hole distance matches the standard handle lock size.

Step 2: Insert the new latch bolt into the door edge and fix the side plate flatly to ensure the spring bolt rebounds flexibly.

Step 3: Connect the internal and external round handles through the middle spindle, tighten the fixing screws, and keep the handle horizontal without tilting.

Step 4: Install the door frame strike plate, debug opening, closing and locking functions, and ensure the door closes tightly without collision or jamming.

Rim Lock

Rim lock is a surface-mounted external lock installed on the door surface instead of embedded installation. It features an independent integrated lock body, simple installation and no need for large-scale grooving and drilling on the door panel, which will not damage the door structure. With a classic mechanical structure, rim locks are wear-resistant and long-lasting, widely used for old-style wooden doors, metal doors and thick door panels that are not suitable for embedded lock bodies.

Best Application Scenarios: Old wooden doors, warehouse doors, courtyard iron gates, thick security doors, storage room doors and retro-style architectural door systems.

Standard Installation Steps

Step 1: Place the rim lock body on the inner door surface, mark the fixed mounting position, and confirm the lock body aligns with the door frame latch position.

Step 2: Fix the main lock body on the door panel with self-tapping screws, ensuring the lock body is closely attached to the door surface without shaking.

Step 3: Install the matching lock catch on the corresponding position of the door frame, calibrate the horizontal and vertical position to ensure accurate locking.

Step 4: Test key unlocking and closing multiple times, check the locking tightness, and adjust the latch gap to ensure stable and quiet operation.

Four Types of Door Locks Comparison Table

※Key Tips for Door Lock Installation

First, select the corresponding lock type according to the door’s usage attribute — use deadbolt locks for exterior anti-theft demands and lever/handle locks for interior privacy needs. Second, keep the lock body horizontal during installation to avoid jamming and bolt deviation. Third, control screw tightening force to prevent door panel deformation. Fourth, test the flexibility of keys and locking structures after installation to ensure long-term stable use.

FAQ

Q1: What is the main difference in security between a deadbolt lock and a door handle/lever lock?

A: A deadbolt lock provides much higher security because its steel bolt extends deep into the door frame and cannot be shimmied or forced open with a credit card. Door handle/lever locks use a slanted latch that automatically clicks into place, which is convenient for daily use but vulnerable to forceful entry if used alone on exterior doors.

Q2: Can I install a lever handle lock on a door that currently has a round knob lock?

A: Yes, in most cases. Both types usually share the same standard hole specifications (such as a 2-1/8 inch bore hole and a 2-3/8 or 2-3/4 inch backset). However, you should always measure the backset (distance from the door edge to the center of the hole) to ensure the new lever lock fits perfectly without drilling new holes.

Q3: Why do many entry doors have both a deadbolt lock and a door handle lock installed together?

A: This is called a combo setup. The lower door handle lock (or lever lock) is used for convenience, allowing you to easily latch and unlatch the door during the day. The upper deadbolt lock is engaged when you leave the house or go to sleep, providing the actual heavy-duty security against break-ins.

Q4: Are lever handle locks legally required for commercial or public rental properties?

A: In many countries, yes. Under regulations like the ADA (Americans with Disabilities Act), commercial buildings and public spaces must use lever handle locks instead of round knobs. This is because levers can be operated with a closed fist or elbow, making them accessible to people with disabilities, the elderly, and children.

Q5: If my deadbolt lock is stuck or hard to turn with the key, do I need to replace the whole lock?

A: Not necessarily. Often, the issue is just friction inside the cylinder or a misaligned door strike plate. Try using a graphite lubricant (never use WD-40 inside the keyhole as it attracts dirt). If lubrication doesn't work, you might only need to rekey or replace the lock cylinder, rather than buying a whole new deadbolt assembly.

Lever handle locks, deadbolt locks, door handle locks and rim locks constitute the four most mainstream door lock types in modern architectural hardware. Each type has independent structural advantages, security grades and installation standards: lever handle locks excel in comfortable daily operation, deadbolt locks provide high-level anti-theft protection, door handle locks offer versatile indoor privacy solutions, and rim locks are ideal for non-destructive installation on special door bodies. Adopting standardized installation methods can maximize lock performance and service life. With CE-certified quality, mature production technology and rich overseas engineering experience, Degol Hardware provides reliable, cost-effective door lock hardware for global residential and commercial construction projects.