21" Economy Full Extension Soft-Close Undermount Drawer Slide Box of 6

Full-Extension Undermount Drawer Slide Built for Both Cabinet Types

The Pro Value Series PRO500 21-inch soft-close undermount drawer slide is a full-extension, ball-bearing undermount that installs in face-frame and frameless cabinets alike. Front and rear mounting brackets are included, covering the hardware requirement for face-frame installs without a separate order.

Key Features

• Soft-close motion — an integrated damper catches the drawer near the end of travel and settles it shut silently.
• Full extension — the drawer clears the cabinet face completely, putting every inch of the interior within reach.
• Face-frame and frameless compatible — one slide works in both cabinet constructions; rear brackets are included for face-frame installs.
• Ball-bearing glide — steel ball bearings run in formed raceways for smooth, consistent movement under load.
• Rated 75 lb per pair — handles a fully stocked kitchen or bathroom drawer without strain.
• Fits 1/2 to 5/8 inch drawer sides — accommodates the two most common drawer box thicknesses in production cabinetry.

Where This Slide Earns Its Place

A 21-inch undermount is the standard choice for base cabinet drawers in kitchen and bath work — deep enough to carry a full box of pots, pans, or bathroom supplies, and long enough to suit the most common 24-inch-deep cabinet run. Full extension matters here: when a drawer goes 21 inches back, a 3/4-extension slide leaves the last several inches of storage effectively out of reach. This slide brings the whole box to the cabinet face. The soft-close close matters equally in high-traffic rooms where drawers get pushed shut dozens of times a day. Quiet close, complete access, and a concealed profile — those three things together are what a kitchen drawer needs, and this slide delivers all three.

Construction and Finish

The PRO500 slide is steel with a zinc finish — a functional, corrosion-resistant coating suited to dry indoor cabinet interiors. The slide stays hidden beneath the drawer box when the drawer is open, so the zinc finish is rarely visible in use, but it does its job protecting the steel members through years of service. Ball bearings in formed raceways give the movement its smooth, consistent feel. The included front and rear mounting brackets are matched hardware for this slide; no cross-brand substitution is needed.

Who Orders This Slide

Cabinet shops running mixed production — some frameless boxes, some face-frame work — reach for a dual-compatible slide to avoid stocking two SKUs. This PRO500 21-inch handles both, with the rear brackets already in the box for the face-frame jobs. Contractors and remodelers replacing worn undermounts in existing kitchens find the face-frame compatibility particularly useful, since most older residential cabinetry is face-frame construction. The 75 lb rating and full-extension travel also satisfy designers specifying drawers for pots-and-pans or heavy pantry pulls where both capacity and access matter. Build the drawer box to the 21-inch nominal length, use 1/2 to 5/8-inch drawer sides, and allow 3/16-inch clearance per side — and this slide goes in without surprises.

The Right Slide for Dual-Cabinet Shops and Kitchen Remodels

A full-extension soft-close undermount that installs in face-frame and frameless cabinets — with the rear brackets already included — removes the main friction point from mixed-cabinet production and remodel work.