Undermount Drawer Slide Built for Full-Depth Kitchen and Bath Access

The Grass Dynapro 21 inch soft-close undermount drawer slide is a concealed, full-extension runner designed for drawer boxes with 1/2 to 5/8 inch sides, rated 100 lb per pair, and built to keep both slides moving in sync without additional hardware. It suits face-frame and frameless cabinet construction.

Key Features

• Full extension brings the entire 21 inch drawer out to the cabinet face, putting the back of the drawer within reach.
• Integrated soft-close catches the drawer near the end of travel and settles it shut quietly every time.
• Built-in synchronization keeps both slides of the pair tracking together on drawers up to 48 inches wide, with no add-on synchronization rod needed.
• 100 lb per pair capacity handles heavily loaded kitchen, bath, and utility drawers.
• Roller-bearing carriage with zinc-finished steel delivers smooth, consistent travel over years of indoor use.
• Face-frame and frameless compatibility makes this a single-stock runner for mixed-construction shops.

Where This Slide Fits the Job

A 21 inch slide is the right length for standard kitchen base drawers in 24 inch deep cabinets, deep vanity drawers, and utility pull-outs where the extra depth over an 18 inch slide puts rear contents within comfortable reach. At full extension the entire box clears the cabinet opening, which matters in a deep pot drawer or a file-style utility pull-out where reaching the back otherwise requires removing the front contents first. The 100 lb per pair rating covers a loaded cutlery tray, a full set of canned goods, or a double-bin organizer without approaching the limit. Because synchronization is built into every Dynapro slide, wide drawers, which tend to rack on unsynchronized runners under uneven loading, track evenly on both sides without an accessory bar.

Construction and Finish

Steel members with a zinc finish give the slide its corrosion resistance for long indoor service. The roller-bearing carriage runs quietly under load and keeps travel consistent as drawer weight shifts over time. Because the slide mounts entirely beneath the drawer box, the zinc finish is a functional choice rather than a decorative one; nothing shows when the drawer is open. The integrated soft-close damper is housed in the slide body, so there are no separate damper clips to stock or replace.

Who Should Specify This Slide

Production cabinet shops running a mixed slate of face-frame and frameless work get the most out of this slide: one runner covers both construction types, and the bulk packaging suits case-quantity ordering. Custom shops and finish carpenters specifying premium kitchen and bath packages will find the synchronized, soft-close Dynapro at home alongside high-end door hardware and drawer fronts. For a homeowner replacing existing slides in a deep kitchen base, the 21 inch length and the 1/2 to 5/8 inch side-thickness range match the most common dovetailed and doweled box construction found in residential cabinetry.

The Right Runner for Deep-Drawer Work

Specify the Grass Dynapro 21 inch soft-close undermount when the job calls for full rear access, quiet closing, and synchronized tracking across a full day of kitchen use.