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EF International Co. Ltd

Leading manufacturer of lever arch mechanisms, ring binder mechanisms, and premium stationery file accessories since 2003. Over 10,000 m² automated factory. Global quality. Precision engineering.

EF Factory Workshop

About EF Factory

One of the largest manufacturers of lever arch mechanisms and stationery file accessories in China.

EF Factory Production Line

Expert Manufacturer Since 2003

Our state-of-the-art factory spans over 10,000 square meters and is equipped with dozens of advanced machines and an automated production line. From raw material processing to final assembly, nearly every step is automated—ensuring consistent quality and high efficiency.

We have maintained a long-term partnership with a top-tier nickel coating factory for over 10 years, guaranteeing rust-free, durable finishes on all metal components.

With professional production technology, competitive pricing, and on-time delivery, we serve both domestic and international markets with hundreds of millions of units produced annually.

  • 20+ Years of Experience
  • 10,000+ m² Automated Factory
  • Over 80 Sizes of Ring Binders
  • Custom Solutions Available

Premium Ring Binder Mechanisms

Trusted manufacturer offering over 80 sizes for file folders, office binders, and stationery products.

Q Ring Binder Mechanisms (4-Ring)

  • Size: 292mm
  • Ring Diameter: 65mm – 100mm
  • Type: Q-Sharp

D Ring Binder Mechanisms (4-Ring)

  • Size: 210mm, 292mm
  • Ring Diameter: 16mm – 65mm
  • Type: D-Sharp

O Ring Binder Mechanisms (4-Ring)

  • Size: 210mm, 292mm
  • Ring Diameter: 13mm – 50mm
  • Type: O-Sharp

3 Slant D Ring Mechanisms

  • Size: 280mm
  • Ring Size: 25mm – 72mm
  • Type: Slant D

3 Ring Q Sharp Mechanisms

  • Size: 280mm
  • Ring Diameter: 16mm – 65mm
  • Type: Q-Sharp

3 Ring D Sharp Mechanisms

  • Size: 210mm, 264mm, 280mm
  • Ring Diameter: 16mm – 65mm
  • Type: D-Sharp

Our Products

High-quality lever arch mechanisms, clips, compressor bars, and accessories for stationery and office use.

75mm Lever Arch Mechanisms + Compressor Bar

75mm Lever Arch Mechanisms + Compressor Bar

Lever Arch Mechanisms + Yellow Handle

Lever Arch Mechanisms + Yellow Handle

Wire Compressor Bar 2-Ring

Wire Compressor Bar 2-Ring

100mm Lever Clip (4 Inch)

100mm Lever Clip (4 Inch)

Metal Spring File Clip

Metal Spring File Clip

Post Binder Pin Clip - 2 Pin

Post Binder Pin Clip - 2 Pin

Eyelets & Rivets Accessory

Eyelets & Rivets Accessory

Spring Clip

Spring Clip

Why Choose EF Factory?

Reliable, efficient, and globally trusted manufacturing partner.

20+

Years Experience

Since 2003, delivering excellence in hardware manufacturing.

10K+

m² Factory

Fully automated production line for consistent quality.

80+

Sizes Available

Wide range of ring binder mechanisms and accessories.

100M+

Units/Year

Mass production capacity with on-time delivery.

200M+

Units Manufactured Annually

50+

Countries Served

10+ Years

Nickel Coating Partnership

Frequently Asked Questions

What materials are used in your lever arch mechanisms?

We use high-grade steel with durable nickel coating to prevent rust and ensure long-term performance.

Can you customize ring binder mechanisms?

Yes, we offer customized ring binders and file accessories tailored to client specifications including size, color, and finish.

What is your production capacity?

We manufacture hundreds of millions of units annually, with scalable capacity to meet large-volume orders.

Do you provide samples?

Yes, we offer product samples upon request. Contact us for more details.

What markets do you serve?

We serve both domestic (China) and international markets, with a growing customer base across Asia, Europe, North America, and beyond.

Get in Touch

For inquiries, samples, or custom orders, please reach out through the official website.

Phone: 0755-61351607

Email: [email protected]

Visit Official Website

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