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The King Slide 21 inch PURELEAD undermount is a concealed, full-extension drawer slide with integrated soft-close, built for drawer boxes with sides up to 3/4 inch thick and sold as a complete pair with locking clips included.
Most standard undermount slides are engineered for drawer sides up to 5/8 inch thick, which suits dovetailed maple and doweled plywood boxes running 1/2 to 5/8 inch material. When the drawer box is built from 3/4 inch stock — solid hardwood sides, thicker shop-built plywood, or a box spec that calls for heavier material — that standard version simply will not fit. This 21 inch slide closes that gap. It carries the drawer at full extension and delivers soft-close action in applications where the thicker box would otherwise require stepping up to a completely different slide family. A 24 inch minimum installation depth keeps the fit straightforward in standard base cabinet depths.
The members are steel with a zinc finish — a functional, corrosion-resistant coating suited to years of indoor cabinet service. Because the slide mounts beneath the drawer box and stays fully hidden when the drawer is open, the finish is practical rather than decorative. The roller-bearing carriage keeps travel smooth and quiet under load, and the integrated soft-close damper requires no separate add-on or adjustment at installation.
Cabinet shops building boxes from 3/4 inch hardwood or thick plywood are the primary audience here. This slide also suits renovation work where an existing drawer box runs thicker sides and the installer needs a concealed, soft-close undermount that fits without remaking the box. The dual face-frame and frameless rating adds flexibility across job types: in face-frame cabinets, fit the series-specific rear mounting brackets behind the frame to support the slide's back end — those brackets are not included and do not interchange with other brands or series. In frameless cabinets, the slide mounts directly to the cabinet side panel.
This version is rated for sides up to 3/4 inch thick, so it accommodates 5/8 inch material as well. If the entire run uses 5/8 inch or thinner sides, the standard 5/8 inch version of this series is the more common choice — but this slide will work either way.
No. The locking clips ship with the slides, but rear mounting brackets for face-frame installs are sold separately and are specific to this series. Plan that order before the install day.
The minimum installation depth is 24 inches, measured inside the cabinet. The nominal slide length is 21-1/2 inches, so the cabinet needs a bit more than that to clear the hardware at the back.
Yes — one pair of slides and the included locking clips arrive together. One pair is what you need for a single drawer.
Yes. Like all undermount slides, this one requires the drawer box to be built to the manufacturer's specification: the correct nominal length, box width formula, bottom recess, and rear notch for the locking-device drilling. An off-spec box will not seat properly on the slides.
When the job calls for 3/4 inch drawer sides and concealed soft-close action, this 21 inch slide covers both requirements in one pair — with the locking clips already in the box.
Sold In: 1 Set
Quantity | Unit Price | Catalog | ||||
|---|---|---|---|---|---|---|
Sold in: 6 Set |  KUKING75-12 Mfr# 280-946 | King Slide 6-Pair Box 12" Soft-Close Full Extension 75 lb Undermount Drawer Slide, Zinc, 280-946 | ||||
Sold in: 6 Set | KUKING75-15 Mfr# 280-947 | King Slide 6-Pair Box 15" Soft-Close Full Extension 75 lb Undermount Drawer Slide, Zinc, 280-947 | ||||
Sold in: 6 Set | KUKING75-18 Mfr# 280-948 | King Slide 6-Pair Box 18" Soft-Close Full Extension 75 lb Undermount Drawer Slide, Zinc, 280-948 |