OCG Soft Close Undermount Drawer Slides 21 in - Smooth Full Extension

In this review the OCG Soft Close Undermount Drawer Slides 21 in (6 pairs) are evaluated for DIYers and cabinet makers who need concealed, heavy-duty runners with soft-close action. The main reason to consider these slides is their combination of full extension and a soft-close mechanism that lets you access the entire drawer while ensuring quiet, controlled closing. The package includes mounting screws, adjustable locking devices and rear brackets so most replacement or new installation projects can start without an extra parts run.

Key Features

• Full extension: Full extension opening gives complete access to drawer contents, making deep drawers much more usable.
• Soft close: The soft-close function prevents slamming and provides a quiet, controlled shut that protects cabinet and drawer fronts.
• Heavy-duty rating: Rated for loads up to 75 lbs, these slides are suitable for dense kitchen or workshop drawers that need stronger hardware.
• Durable construction: Made from high-grade galvanized steel for corrosion resistance and consistent operation in typical home environments.
• Complete kit: Each package includes 6 pairs, rear mounting brackets, adjustable locking devices and mounting screws to support multiple drawers in one project.
• Compatibility: Designed for undermount installation and compatible with both face frame and frameless cabinet styles when used with the included brackets.

Who It's For

These slides are aimed at homeowners doing cabinet upgrades, carpenters fitting multiple drawers on a remodel, and anyone replacing old undermount runners who wants full extension and soft-close performance. The inclusion of six pairs and mounting hardware makes the set convenient for kitchen or bathroom cabinet runs.

Those who should look elsewhere include users needing non-undermount styles or unusual drawer depths; the slides require a drawer depth near 21 in and have minimum cabinet depth requirements, so they are not universal for every retrofit without verification of measurements.

Pros & Cons

Pros

• Reliable soft-close action for quiet operation and reduced wear on drawer fronts.
• Full extension access improves usability of deep drawers and storage reach.
• Sturdy galvanized steel construction supports up to 75 lbs for heavier loads.
• Package includes mounting screws and rear brackets to simplify multiple installations.

Cons

• Some users report mixed long-term sliding smoothness, so performance may vary by installation and maintenance.
• Strict depth and cabinet clearance requirements mean careful measurement is required before purchase.

Specifications

Our Verdict

The OCG 21 in undermount slides are a practical choice for those upgrading multiple drawers who need full extension and soft-close functionality at a reasonable value. They deliver solid durability and a complete hardware kit, but buyers must confirm drawer and cabinet depths before ordering and be aware that a small number of users report changes in smoothness over time.

Frequently Asked Questions

Are these slides suitable for face frame cabinets?
Yes, they are intended for use with face frame or frameless cabinets and include rear mounting brackets for face frame installations.

What drawer depth is required?
The slides suit drawers of about 21 in depth; minimum cabinet depth required is 22.4 in, with a maximum of 23.0 in when using face frame brackets.

Do they come with screws and brackets?
Yes, the package includes mounting screws, adjustable locking devices and rear mounting brackets plus installation instructions.