No matter how superior the profiles are, pairing them with low-quality hardware will only result in products that are "all show and no substance". As a source factory with 17 years of expertise in the door and window hardware sector, we leverage our proprietary production base, full-process quality control system and customized R&D capabilities to provide one-stop hardware supply services for door and window brands and engineering contractors worldwide. Below is a full-category hardware supporting case we customized for a well-known Southeast Asian door and window enterprise, detailing the competitive advantages of core products such as handles, window locks, pulleys and friction stays, and demonstrating the precision and reliability of "Made in China".

The partner client is a renowned brand specializing in high-end residential doors and windows, focusing on energy-efficient, safe and soundproof product lines. Previously relying heavily on local hardware suppliers, the client was plagued by three core pain points:

1. Low cost-performance ratio: Excessive markup layers in the local supply chain led to high terminal prices of doors and windows.
2. Incomplete product range: The need to source accessories like handles and window locks from multiple suppliers resulted in cumbersome supply chain management and uncontrollable delivery cycles.
3. Poor compatibility: Mismatches between mainstream profile specifications and local hardware often caused operational issues such as jamming during opening/closing and inadequate sealing.

Upon understanding the client's needs, we, as an integrated source factory covering R&D, production, testing and sales, promptly set up a dedicated project team. Combining the client's profile parameters, local climatic characteristics (high wind, heavy rainfall and salt spray) and national safety standards, we delivered a full-suite customized hardware solution encompassing four core categories: handles, window locks, pulleys and friction stays. This solution simultaneously resolved the three pain points of cost-performance, supply chain management and compatibility. To date, we have maintained a stable 3-year long-term supply partnership, helping the client increase its door and window market share by over 20%.

As a source factory, we reject homogeneous OEM manufacturing. From raw material selection and mold development to production and testing, we maintain full independent control. Below is a detailed overview of the core supporting products in this case, each tailored to high-end door and window application scenarios, balancing practicality and aesthetic appeal.

Handles are the most frequently used accessories and also the "aesthetic highlight" of doors and windows. The customized handle series for this client perfectly aligns with the design style of its high-end doors and windows while ensuring durability and operational ease.

• Material: Crafted from dual materials of 304 stainless steel and high-quality zinc alloy, avoiding low-grade cast iron (prone to rust and fracture). For coastal areas, we offer specialized 316 stainless steel versions with 50% enhanced salt spray corrosion resistance. These handles passed a 1000-hour salt spray test with zero oxidation or peeling, making them ideal for coastal regions across Europe.
• Surface Treatment: Utilizing vacuum ion plating technology, the handles are available in 6 customizable colors including matte black, champagne gold and antique bronze. The finish boasts a delicate texture that resists scratches and fading, seamlessly matching the client's aluminum and broken-bridge aluminum profiles to elevate the overall premium feel of the doors and windows.
• Design: Following ergonomic principles, the handles feature a round, comfortable grip with a precisely controlled length of 120-150mm, ensuring even force distribution for easy operation by both the elderly and children. Equipped with high-precision spring components, they deliver smooth rebound without jamming or abnormal noise. Having passed 500,000 opening-closing cycles (far exceeding the industry standard of 300,000 cycles), the handles maintain optimal flexibility with a service life of over 20 years.
• Functionality: Customizable integrated linkage versions (connected with window locks) allow one-step opening, closing and locking via handle rotation, eliminating extra operations for enhanced convenience and security. Compatible with multiple window types including tilt & turn windows, sliding windows and casement windows, they offer strong versatility without requiring additional mold development, thereby reducing the client's procurement costs.

Window locks serve as the core security line for doors and windows. For this project, we customized two series—multi-point locks and single-point locks—to meet the diverse needs of different floors and application scenarios.

The core advantages lie in its triple features: anti-pry, sealing and user-friendliness.

• Multi-Point Locks: Adopting a linked locking tongue design, rotating the handle engages 3-5 locking points simultaneously, with the spacing between lock points strictly controlled within 500mm (compliant with 2025 industry regulations). Tightly fitting the window profiles, these locks not only effectively prevent forced prying but also enhance sealing performance, reducing issues such as wind-driven rain leakage and poor sound insulation. Ideal for high-rise windows and floor-to-ceiling windows.
• Single-Point Locks: Boasting a streamlined structure for easy installation, these locks are suitable for low-rise interior windows and balcony windows. The locking tongue is made of thickened stainless steel with an insertion depth of ≥15mm into the profile for superior anti-pry performance. Featuring an anti-misoperation design, they prevent accidental opening by children.
• Detailed Features: The lock body incorporates a precision gear transmission mechanism for smooth operation without jamming, even in low-temperature environments (-30℃), making it suitable for the harsh cold of northern Europe. The lock cylinder features drill-resistant and pry-resistant design, supporting dual unlocking modes—key operation and indoor knob control—balancing anti-theft security and daily convenience for peace of mind when away and easy access at home.

  Additionally, we offer customized lock body dimensions and lock point positions based on the client's profile specifications, eliminating the need for profile design modifications and perfectly resolving the industry-wide pain point of hardware-profile mismatch. We also support bulk logo customization to enhance the client's brand recognition.

For sliding windows, pulley quality directly determines operational smoothness and service life. The customized pulley series in this case specifically addresses the client's previous pain points of sliding jamming, abnormal noise and insufficient load capacity, perfectly adapting to their large-size sliding doors and windows (supporting single sash weight up to 150kg).

• Structure: Featuring a double-sealed bearing design with high-precision stainless steel bearings, the pulleys undergo precision grinding for smooth rotation without jamming or noise. The excellent sealing performance prevents dust and rainwater from entering the bearings, avoiding rust and jamming to extend service life. The pulley wheels are made of high-quality nylon (wear-resistant and silent), paired with stainless steel tracks for ultra-low friction coefficient, achieving nearly silent sliding ideal for high-end residences and hotels with strict noise requirements. The measured noise reduction effect reaches over 35dB.
• Load Capacity: Single-wheel load capacity reaches 80kg, and double-wheel capacity reaches 160kg—far exceeding the industry standard of 50kg per wheel. Even large-size, heavy-profile sliding windows can be operated effortlessly without heaviness. The tracks are made of thickened stainless steel, resistant to deformation and wear. Having passed 100,000 sliding cycles, they remain flat and smooth without scratches or loosening.
• Compatibility: Customizable in various sizes and thicknesses, the pulleys are compatible with sliding windows made of aluminum alloy, broken-bridge aluminum and other profiles. They also support anti-sway design to prevent window shaking during sliding, enhancing user experience. For humid areas, an additional anti-corrosion coating is applied to further improve corrosion resistance and eliminate pulley rust and seizing issues.

Friction stays are primarily used for casement windows and tilt & turn windows, supporting the sash and controlling opening angles. Their stability is directly related to window safety. The customized friction stay series in this case balances stability, flexibility and safety, adapting to the client's various casement window specifications.

• Material: Made of high-strength stainless steel with heat treatment, the friction stays offer high hardness, deformation resistance and fracture resistance, capable of supporting sash weight up to 50kg. Even large-size sashes are held securely, eliminating safety hazards such as sash sagging and falling off. The surface undergoes anodizing treatment for corrosion resistance and wear resistance, preventing rust and adapting to diverse European climates with a service life of over 15 years.
• Design: Adopting a multi-link structure, the friction stays enable smooth opening without jamming or abnormal noise, supporting stepless angle positioning from 0° to 180° to meet different ventilation needs (e.g., 30° opening for daily ventilation, 90° opening for summer heat dissipation). Equipped with built-in damping buffer components, they ensure slow rebound when closing the sash, preventing collision between sash and frame, reducing noise and protecting window profiles from wear.
• Safety Features: Incorporating anti-fall design with built-in safety steel cables, the friction stays prevent sash falling even in case of accidental damage, safeguarding home safety. They also support child safety lock design, limiting maximum opening angle to 30° to prevent children from climbing and falling, catering to the safety needs of high-end residences.
• Compatibility: Customizable in various lengths and load capacities, the friction stays fit different sizes and types of casement windows and tilt & turn windows. We can also adjust opening angles and positioning force according to client requirements without additional mold development, enabling rapid product adaptation. With standardized mounting holes for perfect alignment with window profiles, they reduce installation costs and complexity.

The long-term stable cooperation achieved in this project is not only attributed to product quality and customization capabilities, but more crucially, to our core advantages as a source factory. We have completely resolved the client's supply chain pain points and enabled them to achieve cost reduction, efficiency improvement and quality enhancement.

1. Full-process Independent Control

   We own a modern production base equipped with advanced manufacturing facilities such as automatic pneumatic punching machines and precision die-casting machines. From raw material cutting, die-casting and processing to finished product assembly, the entire production process is independently controlled, eliminating markup from middlemen. Our prices are 30%-40% lower than those of the client's previous local suppliers, significantly reducing their procurement costs. Meanwhile, we have established a professional testing center. Every product must undergo multiple inspection procedures including salt spray testing, opening-closing cycle testing and load-bearing testing. Products that fail to meet standards will never leave the factory, ensuring guaranteed quality.

2. Outstanding Customization Capabilities

   With a professional R&D team, we can quickly customize full-category hardware accessories including handles, window locks, pulleys and friction stays based on the client's profile parameters, design requirements and climatic characteristics. We support customization of colors, sizes, functions and logos, with sample delivery in as fast as 7 days and mass production delivery within 30 days. This effectively addresses the client's pain points of incomplete product range, poor compatibility and slow delivery.

3. Globally Compliant Supply

   Our products are currently exported to countries and regions across Southeast Asia, South Africa, the Middle East and beyond. They are tailored to meet the door & window standards and climatic conditions of different countries, helping clients expand their global market reach. Additionally, we have launched an independent official website, leveraging SEO optimization and Google Ads to enable global customers to conveniently learn about our factory and products, thereby enhancing customer trust.

4. Comprehensive After-sales Service

   We provide a 10-year quality warranty. For any product quality issues (non-artificial damage) during the warranty period, we offer free replacement and repair services. Furthermore, we have a dedicated after-sales team available 24/7 online to promptly resolve any problems encountered by clients during installation and usage, ensuring a worry-free procurement experience.