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Precision Meets Performance

Since 1996, Demass has delivered high-quality measuring tools and hardware solutions trusted by professionals worldwide. Engineered for accuracy, built for durability.

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Engineered for Excellence Since 1996

Oubo Hardware Industrial Ltd., operating under the Demass brand, has been a leader in precision hardware manufacturing for over 25 years. Based in Yuyao, Ningbo, China, we combine innovative design with updated production techniques to deliver reliable tools trusted by professionals globally.

Innovative Design

Cutting-edge product development focused on usability and precision.

Updated Techniques

Advanced manufacturing processes ensure consistent quality and performance.

Quality Management

Rigorous quality control systems ensure every product meets international standards.

Demass Factory
25+

Our Product Range

High-performance tools designed for professionals in construction, engineering, and industrial applications.

Laser Distance Meter

Laser Distance Meter

High-accuracy digital measurement up to 100m with laser precision and data storage.

Planar Laser Level

Planar Laser Level

360° laser projection for accurate leveling and alignment in large-scale construction.

Snap Off Knife

Snap Off Knife

Ergonomic design with segmented blade for clean, safe cutting in tight spaces.

Pocket Tape

Pocket Tape

Compact 3m tape with durable case and smooth retraction for everyday use.

Diameter Tape

Diameter Tape

Specialized tape for measuring pipe and tree diameters with direct readout.

Window Tape

Window Tape

Narrow, flexible tape for measuring window frames and tight architectural gaps.

Long Tape

Long Tape

Extended reach tapes up to 50m with reinforced blades and ergonomic cases.

Chalk Line

Chalk Line

High-visibility marking tool with durable reel and smooth chalk dispersion.

Folding Ruler

Folding Ruler

Precision wooden or metal ruler with locking joints for accurate straight-edge use.

Promotion Tape

Promotion Tape

Custom-branded tapes ideal for marketing campaigns and corporate giveaways.

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Advanced Manufacturing Techniques

Our commitment to quality starts with precision engineering and cutting-edge production methods.

Main Material

High-grade carbon steel and ABS plastic ensure durability and resistance to wear.

Blade Layout

Optimized blade width and curvature for maximum rigidity and extended reach.

Blade Finish

Corrosion-resistant coatings enhance longevity in harsh environments.

Bi-Color Coating & Two-Side Printing

Dual-tone blades with legible markings on both sides for improved readability.

Five-Color Printing

High-resolution, fade-resistant printing for clear measurement indicators.

Reference of End Hook

Precision-calibrated hooks ensure accurate inside and outside measurements.

Blade Stand-Out

Engineered curvature allows extended reach without buckling.

Blister Card Packaging

Secure, retail-ready packaging that protects and displays products effectively.

Five-Color Printing

Vibrant, durable printing ensures long-term legibility under all conditions.

International Certifications

EC

European Conformity

MID

Measuring Instruments Directive

JIS

Japanese Industrial Standards

ISO

Quality Management Systems

Our products meet rigorous international standards for accuracy, safety, and reliability. Download certificates and technical documentation from our official website.

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Get in Touch

For inquiries, catalog requests, or partnership opportunities, visit our official website to contact the Demass team.

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