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Precision Magnetics for Industry & Innovation

Manufacturer of high-performance magnetic tools, materials, and assemblies — trusted by global partners for over 30 years.

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About 3J International

3J International is an import and export company with its own manufacturing facility, located in Ningbo, Zhejiang, China. With over 30 years of experience in the magnetic industry, we are one of the leading manufacturers of magnetic tools, materials, and assemblies in China.

Our core expertise lies in developing innovative magnetic solutions for diverse industries — from automotive repair and office supplies to industrial motors and custom engineering applications.

30+

Years in Industry

50+

Global Markets

3J International Product Showcase

Our Products

High-quality magnetic tools, materials, and assemblies engineered for performance and durability.

Magnetic Hooks

Magnetic Hooks

Heavy-duty magnetic hooks ideal for workshops, garages, and industrial environments. Strong neodymium core for maximum holding power.

Pick-Up Tools

Pick-Up Tools

Retractable magnetic pickup tools for mechanics and technicians. Perfect for retrieving metal parts from tight spaces.

Name Badge Magnets

Name Badge Magnets

Secure, non-damaging magnetic badge holders. Ideal for uniforms, medical staff, and corporate environments.

Holding Magnets

Holding/Retrieving Magnets

Industrial-strength holding magnets for fixtures, jigs, and retrieval tasks. Designed for reliability under stress.

Latch/Door Magnets

Latch/Door Magnets

Smooth-action magnetic latches for cabinets, doors, and enclosures. Corrosion-resistant and long-lasting.

Ferrite Magnets

Ferrite Magnets

Also known as ceramic magnets, widely used in motors, speakers, and industrial applications due to cost-efficiency and stability.

Neodymium Magnets

Neodymium Magnets

Sintered NdFeB magnets offering the highest magnetic strength. Ideal for precision devices and high-performance motors.

Flexible Magnets

Flexible Magnets

Rubberized ferrite-based magnets used in signage, gaskets, and magnetic sheets. Can be cut to custom shapes.

Inspection Mirrors

Inspection Mirrors

Bendable inspection mirrors with magnetic bases. Essential tools for automotive and mechanical diagnostics.

Magnetic Clips

Magnetic Clips

Durable magnetic clips for holding documents, wires, and tools. Ideal for industrial and office use.

Magnetic Assemblies

Magnetic Assemblies

Custom-engineered magnetic systems for motors, sensors, and industrial automation. Fully assembled and tested.

Lifting Magnets

Lifting Magnets

Industrial lifting magnets for handling steel plates, blocks, and scrap. Safe, efficient, and powerful.

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Our Services

End-to-end support from concept to delivery — tailored for your business needs.

Product Design

Our experienced engineering team develops custom magnetic solutions based on your specifications and application requirements.

Rapid Prototyping

Fast turnaround prototypes to validate designs and accelerate time-to-market for new products.

Mold Making

Precision molds for injection, stamping, and die-casting — essential for high-volume production.

Manufacturing & Assembling

Full-scale production with strict quality control. From raw materials to finished assemblies.

Custom Sourcing

We source and supply a wide range of components beyond magnetics to support your supply chain.

Exporting & Shipping

Seamless international logistics, documentation, and shipping to ensure on-time delivery worldwide.

30+

Years Experience

50+

Countries Served

1000+

Custom Projects

99.8%

On-Time Delivery

Frequently Asked Questions

What types of magnets do you manufacture?

We produce neodymium-iron-boron (NdFeB), ferrite (ceramic), bonded, and flexible magnets. We also offer custom magnetic assemblies and devices.

Do you offer OEM/ODM services?

Yes, we provide full OEM and ODM support including product design, prototyping, mold making, and mass production.

Where are your manufacturing facilities located?

Our factory and trading company are based in Ningbo, Zhejiang, China. We also have a sales office in Fullerton, California, USA.

What industries do you serve?

Our products are used in automotive, electronics, industrial machinery, medical devices, office supplies, and consumer goods.

Can I request a sample?

Yes, we offer samples for most products. Please contact us via email or phone to request specific items.

Get in Touch

Have questions or need a quote? Reach out to our team today.

Ningbo Office

NO.12 Zhen Xing Road, Xiaogang, Beilun
Ningbo, Zhejiang, China, 315803

Tel: +86-574-89077053

Email: [email protected]

L.A. Office

1312 E Orangethorpe Ave.
Fullerton, CA 92831, USA

Tel: 714-701-6780

Factory

Ningbo JS Brothers Tool Factory Ltd.
NO.12 Zhen Xing Road, Xiaogang, Beilun
Ningbo, Zhejiang, China

Tel: 0574-55875152

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