D&D Hardware
Door Knob Lock

Door Knob Lock

Door Knob Lock is a widely used locking solution that combines a rotating handle and an internal locking mechanism within a compact structure. The lock is activated by turning the knob, which retracts the latch and allows the door to open. Commonly installed on interior and exterior doors, door knob locks offer a practical balance between security and convenience. Their standardized dimensions and simple installation make them suitable for large-scale housing projects and commercial applications requiring efficient hardware solutions.

Technical Features And Advantages

Engineered for durability, security, and consistent performance across residential and commercial applications.

> Integrated Knob and Latch Mechanism
Door knob locks combine the handle and latch into a single compact unit, simplifying installation and operation. The rotating knob retracts the latch smoothly, allowing efficient door opening and closing in daily use.
> Flexible Lock Structure Options
Available in tubular and cylindrical designs, offering easy installation or enhanced durability. Fits standard 54mm/25mm boreholes with adjustable 60/70mm backsets for wide door compatibility.
> Multiple Function Configurations
Available in passage, privacy, and keyed entry versions, door knob locks support different application needs. Privacy locks include internal thumb turns, while keyed models provide additional security for entry doors.
> Reliable Cycle Performance
Quality door knob locks are tested for durability, often reaching 200,000 operation cycles depending on grade level. This ensures stable performance in residential and moderate traffic commercial environments.

Main Products

Flexible options available for wholesale, project supply, and OEM/ODM requirements.

Commercial Door Knob with Lock
Commercial Door Knob with Lock

Commercial Door Knob with Lock offers a practical and durable locking solution for high-frequency door applications in residential and commercial environments. Manufactured from stainless steel, it maintains consistent performance and surface integrity under daily use, while the brass cylinder and keys provide stable locking accuracy and extended service life. Each set includes a complete assembly package with knob lockset, latch, striking plate, fixing materials, and installation manual, allowing efficient on-site fitting without additional components. With selectable backsets of 60mm and 70mm and mechanism options including tubular and cylindrical types, this lockset supports flexible configuration for bulk orders, project installations, and wholesale distribution.

Product ModelDDLK001
Cylinder + KeysBrass
KnobStainless Steel
RosetteStainless Steel
Rosette Diameter65mm, 75mm
FinishSSS, AB, AC, PB, US10B
Suitable For DoorFlush Timber / Wooden / Aluminium / Steel Doors
Mechanism OptionTubular Type, Cylindrical Type
Door Thickness1-3/8" to 1-3/4" (35mm to 45mm)
BacksetAdjustable 2-3/8"(60mm),2-3/4"(70mm)
MOQ100PCS
Package1pc / poly bag, white box / color inner box, standard export carton
Sample Time5-7 working days
Production Lead Time30-35 days normally
Shipping PortJiangmen, China / Shenzhen, China
Double Sided Lock Door Knob
Double Sided Lock Door Knob

Reliable access control starts with hardware that performs consistently across daily use and high-traffic conditions. The Double Sided Lock Door Knob offers a practical locking solution for both interior and light commercial applications, combining mechanical stability with a clean architectural appearance. This commercial lockset fits a wide range of door types including flush timber, wooden, aluminium, and steel doors, making it suitable for diverse installation environments. A solid stainless steel knob and rosette provide durability against wear, while the brass cylinder and matching brass keys ensure smooth key operation and dependable locking performance over time. Each set is supplied complete with latch, striking plate, fixing materials, and installation manual, enabling straightforward setup without additional sourcing.

Product ModelDDLK003
Cylinder + KeysBrass
KnobStainless Steel
RosetteStainless Steel
Rosette Diameter65mm, 75mm
FinishSSS, AB, AC, PB, US10B
Suitable For DoorFlush Timber / Wooden / Aluminium / Steel Doors
Mechanism OptionTubular Type, Cylindrical Type
Door Thickness1-3/8" to 1-3/4" (35mm to 45mm)
BacksetAdjustable 2-3/8"(60mm),2-3/4"(70mm)
MOQ100PCS
Package1pc / poly bag, white box / color inner box, standard export carton
Sample Time5-7 working days
Production Lead Time30-35 days normally
Shipping PortJiangmen, China / Shenzhen, China
Double Cylinder Door Knob
Double Cylinder Door Knob

The Double Cylinder Door Knob is a secure locking solution engineered for both residential and light commercial entry systems where controlled access from both sides is required. Featuring a dual-key operation, this lockset enhances door security by requiring a key for entry and exit, making it suitable for exterior doors, side entrances, and areas where additional protection is necessary. The combination of a stainless steel knob and rosette ensures a solid structural presence, while the internal brass cylinder and brass keys provide reliable locking performance with smooth key rotation. Each set is supplied complete with latch, striking plate, fixing materials, and installation manual, ensuring a straightforward installation process for bulk orders and project applications.

Product ModelDDLK004
Materialstainless steel
FinishSatin Stainless Steel, Polished Stainless Steel, Polished Brass, Matt Black, Physical Vapor Deposition, Antique Brass, Antique Copper
Suitable for DoorWooden door, Metal door, Interior door, Outer door etc.
MOQ100PCS
Package1pc/poly bag, white box / color inner box, standard export carton.
Sample time5-7 working days
Production Lead Time30-35 days normally
Shipping PortJiangmen, China / Shenzhen, China

Applications

Door knob locks are widely used in residential housing, apartments, offices, and hospitality projects where convenient access control is required. They are commonly installed on bedroom doors, bathrooms, interior passages, and secondary entry points. In large-scale developments, these locks provide a uniform hardware solution that supports efficient installation and maintenance. Their versatility allows project planners to select different configurations based on privacy and security requirements across various spaces.

Residential Building
Office Building
Hotel
Healthcare
Education
Commercial Building

Video

See real product details, structure, and usage scenarios through our visual demonstrations.

A Guide to Door Lever Locksets and Knob Locks

Why choose us?

Icon
Full International Certification
Products are fully compliant with UL, CE, ANSI, and BHMA standards, meeting regulatory requirements across major global markets.
Icon
ISO 9001 Certified Manufacturing
ISO 9001–certified production with strict quality control ensures consistent performance, reliability, and long-term durability.
Icon
Complete Door Hardware System
A comprehensive range of door hardware products, fully matched and compatible, enabling one-stop procurement for all door applications.
Icon
Professional Engineering & Technical Support
Comprehensive technical support including CAD/BIM drawings, hardware schedules, and application guidance to support project design and execution.
Icon
End-to-End OEM / ODM Capability
From product design and engineering to branding, packaging, and logo customization, providing complete OEM/ODM solutions tailored to market needs.
Icon
Advanced Manufacturing Equipment
Modern production lines and advanced machinery enhance productivity while ensuring precision, consistency, and product quality.
Icon
Proven Global Project Experience
Extensive experience supplying door hardware for hotels, hospitals, commercial buildings, and public projects worldwide.
Icon
Reliable On-Time Delivery
Stable production capacity and supply chain management ensure on-time delivery for global partners and long-term projects.
Icon
Long-Term Mechanical Guarantee
All products are backed by a 10-year mechanical guarantee, reinforcing confidence in quality and performance.

FAQs

How can I obtain your latest pricing?

Please contact us by email or phone with your detailed requirements. Our team will reply within 24 hours. In addition to door hardware, D&D also delivers complete door opening solutions.

What payment terms do you accept?

We accept T/T, D/P, Western Union, and L/C as payment methods.

Are you a manufacturer or a trading company?

We are a manufacturer with over 18 years of experience and are an SGS-audited factory specializing in architectural hardware.

Can I request samples before placing an order?

Yes. Up to three samples can be provided free of charge. Customers are required to arrange a courier account for freight collection.

What stainless steel grades are available?

We mainly use SUS304 and SUS316 stainless steel, with SUS201 available for selected product applications.

What warranty do you provide?

All our products are backed by a 10-year mechanical warranty.

Do you have a quality management system in place?

Yes. We operate a complete quality control system, with strict inspection and monitoring at every stage of mass production following standardized procedures.

Do you offer OEM and ODM services?

Yes. We provide both OEM and ODM solutions and have extensive experience collaborating with well-known global brands.

What certifications do your products have?

Our products carry CE and UL certifications, and all designs are developed in accordance with international standards such as EN/CE, UL, ANSI, and BHMA.

Get In Touch

×