D&D Hardware
Deadbolt Lock

Deadbolt Lock

A Deadbolt Lock is a mechanical locking solution that secures a door using a solid metal bolt extending deeply into the door frame. Unlike spring latch systems, the bolt operates independently through a key or thumb turn, improving resistance against forced entry. Deadbolt locks are widely applied in residential and commercial doors where higher security levels are required. Their simple internal structure reduces wear risks while maintaining stable locking performance over long-term use, making them a reliable choice for consistent door protection.

Technical Features And Advantages

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

> Solid Bolt Locking Structure
Deadbolt locks use a solid steel bolt that extends into the door frame, typically reaching a depth of 20–25 mm. This structure enhances resistance against forced entry attempts such as prying or kicking compared to spring latch systems.
> Independent Locking Mechanism
The bolt is operated by a key or thumb turn without relying on internal springs, reducing wear over time. This independent operation ensures stable locking performance even after long-term and repeated usage cycles.
> Durability and Cycle Testing
Quality deadbolt locks are tested for durability, often exceeding 200,000 operation cycles depending on grade requirements. This ensures reliable performance in both residential and light commercial environments.
> Compatibility with Standard Door Sizes
Deadbolt locks are manufactured with standard backsets such as 60 mm and 70 mm, ensuring compatibility with most wooden and metal doors. This simplifies installation and replacement in project applications.

Main Products

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

Square Deadbolt Lock
Square Deadbolt Lock

Square Deadbolt Lock DDLK021-A and DDLK021-B offer a clean geometric appearance combined with reliable mechanical security for modern door systems. The square rosette structure delivers a sharp and contemporary visual profile, making it suitable for both residential and light commercial environments. Equipped with a solid brass cylinder and precision-engineered internal components, this deadbolt lock ensures stable locking performance and consistent operation over long-term use. The adjustable backset allows flexible installation across standard door preparations, while compatibility with common door thickness ranges simplifies project integration. Available in both single cylinder and double cylinder configurations, it supports different access control requirements, providing a balanced combination of security, adaptability, and aesthetic consistency for bulk order and project applications.

Product ModelDDLK021-ADDLK021-B
TypeSingle Cylinder Deadbolt LockDouble CylinderDeadbolt Lock
Cylinder + KeysBrass
RosetteZinc Alloy
Square Rosette65mm × 65mm
Door Thickness1-3/8" to 1-3/4" (35mm to 45mm)
BacksetAdjustable 2-3/8"(60mm),2-3/4"(70mm)
FinishSSS, AB, AC, PB, US10B
Mechanism OptionTubular Type
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
Round Deadbolt Lock
Round Deadbolt Lock

Round Deadbolt Lock DDLK022 series offers a practical security solution for residential and light commercial doors, combining stable mechanical performance with a clean circular rosette design. The lockset is available in both single cylinder and double cylinder configurations, allowing flexible selection based on security requirements and door environments. With a solid brass cylinder and precision-engineered internal structure, it ensures reliable locking performance and smooth operation over long-term use. The 70mm zinc alloy rosette provides a balanced visual proportion while maintaining structural strength, making it suitable for modern door hardware systems. Its adjustable backset and compatibility with standard door thickness ranges allow easy installation across various door types. Multiple surface finishes support consistent matching with different architectural styles and project specifications.

Product ModelDDLK022-ADDLK022-B
TypeSingle Cylinder Deadbolt LockDouble Cylinder Deadbolt Lock
Cylinder + KeysBrass
RosetteZinc Alloy
Rosette Diameter70mm
Door Thickness1-3/8" to 1-3/4" (35mm to 45mm)
BacksetAdjustable 2-3/8"(60mm),2-3/4"(70mm)
FinishSSS, AB, AC, PB, US10B
Mechanism OptionTubular Type
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
Occupancy Indicator Deadbolt
Occupancy Indicator Deadbolt

Clear status visibility and secure access control come together in this Occupancy Indicator Deadbolt, a practical locking solution for high-traffic restroom and privacy-focused spaces. Engineered for commercial environments, this mortise-style deadbolt integrates an internal thumb turn with an external indicator that clearly displays “In Use” or “Vacant,” helping reduce interruptions and improve user flow. An emergency release function is included for safety compliance, allowing authorized access when needed without compromising everyday privacy. Fully aligned with ADA A117.1 accessibility requirements, this deadbolt offers a reliable solution for facilities that prioritize both safety standards and user convenience in commercial applications.

Product ModelDDLK028
MaterialZinc Alloy / Brass
Door Thickness1-3/8" to 1-3/4"(35mm to 45mm)
BacksetAdjustable 2-3/8"(60mm),2-3/4"(70mm)
IncludesEmergency release key
ADA ComplianceMeets ADA requirements-A117.1 Accessibility Code
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

Deadbolt locks are widely used on residential entry doors, apartment units, office entrances, and light commercial properties where reliable physical security is required. They are commonly installed as a primary locking solution or paired with handle locks for dual protection. In housing projects, deadbolt locks help improve access control and tenant safety, while in commercial settings they provide dependable security for offices, storage rooms, and service areas. 

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

×