King Slide 6-Pair Box 21" Soft-Close Full Extension 75 lb Undermount Drawer Slide, Zinc, 280-944

Undermount Drawer Slide Built for Face-Frame and Frameless Cabinets Alike

The King Slide 21 inch soft-close full-extension undermount is a concealed drawer runner designed for shops and installers working across both face-frame and frameless construction. Rated 75 lb per pair and made for drawer boxes with sides up to 5/8 inch thick, it ships with its front locking clips included so you can go straight from the box to the install.

Key Features

• Full extension brings the entire 21 inch drawer out to the cabinet face, giving complete access to the back of the box.
• Integrated soft-close catches the drawer near the end of travel and settles it shut quietly on every close.
• Dual cabinet-type compatibility suits both face-frame and frameless construction from the same SKU.
• Front locking clips included so the full mounting hardware set arrives in one shipment.
• 75 lb weight capacity per pair covers loaded kitchen, bath, and utility drawers at this length.
• Steel construction with zinc finish for reliable indoor performance concealed beneath the drawer box.

Where This Slide Earns Its Keep

The 21 inch length is a workhorse size — long enough for standard base-cabinet drawers, deep enough for a fully stocked utensil drawer or a bathroom vanity drawer holding supplies toward the back. At full extension, the entire box clears the cabinet opening, so nothing gets buried. The soft-close mechanism means the close is controlled on every use, which matters in kitchens where drawers get pushed shut with a nudge rather than a deliberate push. Because this slide suits both face-frame and frameless cabinets, it simplifies ordering on mixed jobs where some boxes are traditional face-frame construction and others are frameless Euro-style — one slide covers both without a separate SKU for each cabinet type.

Construction and Finish

The slide members are steel with a zinc finish — a practical, corrosion-resistant coating suited to years of dry indoor service. Because the slide mounts beneath the drawer box, the finish stays hidden in use; what matters is that it holds up without corroding or binding the carriage. The locking clips that secure the drawer box to the slide are series-specific King Slide parts, included with this SKU, which removes one of the most common sourcing gaps in undermount slide orders.

Who Should Specify This Slide

Cabinet shops running mixed production — some face-frame, some frameless — will appreciate a single undermount SKU that works in both without adaptation. Installers finishing out kitchen or bath cabinetry will find the included clips and the 24 inch minimum installation depth straightforward to work with in standard cabinet boxes. The 75 lb per pair rating puts this slide in the right range for residential drawers loaded with cookware, pantry goods, or bathroom supplies, where drawer weight is real but not extreme. For drawer boxes built from material up to 5/8 inch thick, this slide fits the most common shop output without requiring a special build.

Ready for the Next Job

One slide length, two cabinet types, included clips — the King Slide 21 inch soft-close undermount is built to simplify ordering and speed up installation on the jobs that do not have time for missing hardware.