Zinc Undermount Drawer Slide For Thick-Sided, Heavy Drawers

This is the 27 inch Grass Dynapro heavy-duty undermount drawer slide — a full-extension, soft-close concealed runner built for drawer boxes with 5/8 to 3/4 inch sides and rated 132 lb per pair. It is the right choice when a standard 100 lb undermount is not enough and the drawer box is built from thicker material.

Key Features

• 132 lb capacity per pair — the heavy-duty Dynapro rating, suited to deep pantry drawers, oversize base cabinet drawers, and other high-load applications.
• Full extension — the entire 27 inch drawer box comes out to the cabinet face, putting the back of the drawer within reach.
• 5/8 to 3/4 inch drawer side compatibility — engineered for the thicker box sides common in solid hardwood and 3/4 inch plywood construction.
• Integrated soft-close — a built-in damper catches the drawer near the end of travel and settles it shut silently.
• Fits face-frame and frameless cabinets — one slide model covers both construction types with the correct series hardware.
• Roller-bearing carriage, steel construction, zinc finish — smooth travel under load with corrosion resistance suited to years of indoor service.

Where This Slide Earns Its Keep

The 27 inch length targets deep base cabinets and pantry pull-outs where drawer contents are heavy and rear access matters. A 27 inch drawer in a pots-and-pans base, a fully loaded spice pull-out, or an oversize file drawer can approach or exceed what a standard undermount handles — the 132 lb rating per pair gives that headroom. Full extension means the back of the box clears the cabinet face completely, so nothing gets lost at the rear. For shops running dovetailed hardwood boxes or cases built from 3/4 inch plywood, the 5/8 to 3/4 inch side-thickness range is the detail that makes this the correct Dynapro version rather than the standard 16mm model.

Construction and Finish

The Dynapro runner uses a roller-bearing carriage on formed steel members with a zinc finish. The concealed mounting keeps all slide hardware beneath the drawer box — nothing shows from the side when the drawer is open. Side clearance is 6mm, so the drawer box width formula accounts for that gap on each side. The minimum installation depth is 27-7/8 inches, meaning the cabinet interior must be at least that deep before the slide's rear end has clearance to seat properly. Build the box to Grass's published specification for this series: nominal 27-23/32 inch length, correct box width for the 6mm side clearance per side, bottom recess, rear notch, and the drilling required for Dynapro front locking devices.

Who Should Specify This Slide

Cabinet shops building boxes from 3/4 inch hardwood or solid-sided plywood drawers will find this the natural Dynapro fit — the standard 16mm version does not accommodate that material thickness. Designers specifying deep pantry or heavy-use kitchen drawers get the capacity margin that puts the install well inside the rated load. Contractors sourcing for high-end residential work benefit from a single slide model that covers both face-frame and frameless construction on the same job. In face-frame cabinets, plan for the Dynapro-specific rear mounting brackets, sold separately; they are not interchangeable with rear brackets from other slide brands or series.

Frequently Asked Questions

The Right Slide for Heavy Drawers Built From Thick Stock

When the drawer box is 3/4 inch material and the load pushes past what a standard undermount handles, this 27 inch Dynapro heavy-duty slide closes the gap — delivering full extension, silent soft-close, and a 132 lb rating in one concealed runner.