What is the difference between single extension and full extension?
2025-04-28
Understanding the nuances of furniture hardware is crucial for both designers and consumers who desire functionality and aesthetic appeal in their home or office setups. One essential component in cabinetry and furniture is the drawer slide. Specifically, we'll delve into the KINGSTAR Single Extension Soft Closing Under Mounted Slide and address a common query: what is the difference between single extension and full extension?
Understanding Single Extension Slides

At the heart of pinpointing the differences between slide types is recognizing how they function. The KINGSTAR Single Extension Soft Closing Under Mounted Slide is a premier choice for various cabinetry needs. Naturally soft-closing, this slide type seamlessly glides your drawer back into its shell without unnecessary slamming — a valuable feature for preserving the integrity of both the furniture and what’s stored within. This undermount slide, specifically, remains hidden underneath the drawer, enhancing the aesthetic clean lines of modern furniture design.
Key Features of KINGSTAR’s Offering
1. Ease of Installation and Uninstallation: One of the standout features of KINGSTAR’s single extension slides is their ease of installation and removal. Smooth sliding is achieved with little effort, making it user-friendly for both professional installers and DIY enthusiasts.
2. Load Capacity and Adjustments: Supporting loads of up to 25 kilograms, these slides are robust enough to manage typical household and office weight requirements. Additionally, the up-and-down adjustment range of 0-3mm provides extra flexibility to ensure a perfect fit and smooth operation, even with minor sizing discrepancies.
3. Durability Assured Through Rigorous Testing: KINGSTAR prides itself on providing products that endure the test of time. This commitment to quality is evidenced by their slides passing a 6000 times life cycle test and a 48-hour salt spray test, guaranteeing resistance against corrosion and ensuring longevity.
Single Extension vs. Full Extension

The terms “single extension” and “full extension” directly relate to how much of the drawer can slide out from its housing.
- Single Extension: As exemplified by the KINGSTAR slide, single extension allows the drawer to open to a portion, typically around three-quarters, of its complete length. This is often sufficient for accessing the majority of the drawer's content, offering a balance between functionality and space efficiency.
- Full Extension: Conversely, a full extension slide permits the drawer to glide completely out of the cabinet. This accessibility is invaluable for applications requiring visibility and reach of the entire drawer, such as filing cabinets.
Choosing the Right Slide for Your Needs
The choice between single and full extension will largely depend on what your specific requirements entail. Single extension slides, like the KINGSTAR’s, are ideal when cost-effectiveness, ease of installation, and appearance take precedence. They provide sufficient access for most everyday applications and their under-mounted design keeps the drawer design sleek and modern.
On the other hand, full extension slides make more sense in scenarios where the entire drawer contents need to be accessed without removing the drawer entirely, for instance, when frequently reaching for small items or when drawing out heavy loads that could unbalance a partially opened drawer.
Conclusion
In deciding between single and full extension slides, understanding the functionality, design considerations, and specific use-case requirements is crucial. The KINGSTAR Single Extension Soft Closing Under Mounted Slide embodies a mixture of durability, ease of use, and a clean design, suitable for a variety of applications where subtlety and efficiency are key. Whether you're enhancing your kitchen cabinetry, outfitting an office, or maximizing space in a bedroom, understanding these concepts ensures you make an informed choice tailored to your needs.
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