18 Inch Undermount Drawer Slide for Kitchen and Bath Drawers That Need Full Rear Access

The Grass Dynapro 18 inch soft-close full-extension undermount slide is a concealed roller-bearing runner rated 100 lb per pair, designed for drawer boxes with 1/2 to 5/8 inch sides in both face-frame and frameless cabinets. It mounts completely out of sight beneath the box so the interior of the drawer is all wood when open.

Key Features

• Full extension brings the entire 18 inch drawer box out to the cabinet face, putting every corner within reach.
• Integrated soft-close catches the drawer near the end of travel and settles it shut without slamming.
• 100 lb capacity per pair handles the loaded pots drawer, the heavy utensil box, or the deep pantry pull-out.
• Face-frame and frameless compatibility covers both traditional American and European-style cabinet construction in one slide.
• Roller-bearing carriage on zinc-finished steel delivers a smooth, quiet pull through years of daily cycling.
• 5 mm side clearance keeps the concealed profile tight, leaving more usable drawer width in a given cabinet opening.

Where This Slide Earns Its Keep

An 18 inch run is the go-to length for base cabinet drawers in kitchen and bath work — deep enough to hold full-size cookware, shallow enough to fit a standard 21 inch base without dead space behind the box. At 100 lb per pair, the Dynapro handles everything from a stacked-plate drawer to a bath vanity loaded with product. Full extension matters most when the back of the drawer is actually used: spice storage, divided utensil inserts, and pull-out organizers all demand that the rear third of the box clears the opening. Soft-close is a baseline expectation on any concealed slide at this price point, and the Dynapro's integrated damper delivers a controlled, consistent close without an add-on kit.

Construction and Finish

The Dynapro runner is steel with a zinc finish — a functional, corrosion-resistant surface suited to indoor cabinetry. Because the slide mounts entirely beneath the drawer box, the finish is largely hidden in service; durability matters more than appearance here. The roller-bearing carriage keeps travel smooth under load and stays quiet over time. The 18-11/16 inch nominal length and 18-27/32 inch minimum installation depth mean the slide fits a standard 18 inch drawer in a cabinet with adequate interior depth — measure the cabinet first to confirm clearance behind the rear notch.

Who This Slide Is For

Cabinet shops running production kitchens and bath vanities will find the Dynapro's face-frame and frameless flexibility useful across mixed job types. Frameless builders get a direct side-panel mount on the system-hole grid; face-frame shops add the Dynapro-specific rear mounting brackets behind the frame. Designers specifying full-access concealed slides for residential kitchens get a 100 lb runner that meets premium residential expectations without stepping up to a heavier-duty platform. The 5/8 inch maximum side thickness covers the most common drawer box material — dovetailed maple, doweled Baltic birch, and CNC-routed plywood boxes all fall in this range.

The Right Slide Keeps the Project Moving

Match the 18 inch Dynapro to your drawer depth, build the box to Grass's specification, select the locking devices and any rear brackets your cabinet construction requires, and this concealed runner handles the rest.