PRO Value PRO600 6-Pair Box 21" Soft-Close Full Extension 100 lb Undermount Drawer Slide, Zinc, 0684250504961 6

Pro Value Series Undermount Drawer Slide For Full-Access, Ball-Bearing Precision

The PRO600 is a 21 inch full-extension undermount drawer slide with integrated soft-close, running on steel ball bearings and rated 100 lb per pair. It mounts in both face-frame and frameless cabinets and is engineered for drawer boxes with 1/2 to 5/8 inch sides, making it a capable, straightforward choice for production and custom cabinet work alike.

Key Features

• Full-extension travel brings the entire 21 inch drawer box out to the cabinet face so nothing stays hidden at the back.
• Integrated soft-close catches the drawer near the end of travel and settles it shut silently without a slam.
• Ball-bearing carriage delivers a smooth, consistent pull under load, with less friction than nylon-roller alternatives.
• 100 lb capacity per pair covers loaded kitchen, bath, and utility drawers without headroom concerns.
• Fits both face-frame and frameless cabinets, giving shops a single slide SKU that works across construction styles.
• Zinc-finished steel construction holds up through years of daily indoor use.

Where the 21 Inch Length Earns Its Place

The 21 inch slide length suits standard base cabinet drawers with 20 to 21 inch interior depths — the dimension that appears most in 24 inch deep base cabinets with face frames or applied backs. At full extension, the drawer travels to the cabinet face, putting the full depth of a pots-and-pans drawer, a utensil drawer, or a deep pantry pull-out within reach. Pair this length with a drawer box built to the PRO600 specification, including the correct rear notch and the drilling pattern for the front locking devices, and the installation is clean and repeatable across a run of cabinets. For shallower cabinets or shorter boxes, step down to an 18 inch slide; for deeper cases, move up in the family.

Construction and Finish

Steel ball bearings running in formed-steel raceways give the PRO600 a pull that stays smooth and quiet even as the drawer loads up. The zinc finish protects the steel members through daily indoor service — functional rather than decorative, which suits an undermount slide that stays hidden beneath the box once the drawer is hung. The slide is engineered for drawer sides in the 1/2 to 5/8 inch range; a 3/4 inch side calls for the separate 3/4 inch version of the line, not this model. Front locking devices are series-specific to the PRO600 and do not interchange with other brands or slide families.

Who Orders This Slide

Cabinet shops running production work in both face-frame and frameless construction get the most from the PRO600's dual-construction compatibility. A single slide SKU that installs the same way in both cabinet styles reduces purchasing complexity without sacrificing the concealed look or the soft-close motion that residential buyers expect. Homeowners tackling a kitchen renovation and contractors building out custom bath vanities will find the 100 lb rating and full-extension travel match the demands of everyday cabinet drawers. For face-frame installs, the rear mounting brackets are required to support the slide's back end; these are sold separately and are specific to the PRO600 series.

A Concealed Slide Built for the Work

Ball-bearing travel, full extension, soft-close closing, and a 100 lb pair rating in a single undermount slide that fits both face-frame and frameless work — the PRO600 in 21 inches is the right fit for production shops and individual builds that need a capable concealed slide without premium-brand pricing.