Grass Dynapro Undermount Drawer Slide Built for 3/4 Inch Drawer Sides

This is the Grass Dynapro 18 inch full-extension, soft-close undermount slide in the 3/4 inch side-thickness version — a concealed runner rated 100 lb per pair, engineered for drawer boxes built from 5/8 to 3/4 inch material, and suited to both face-frame and frameless cabinets.

Key Features

• Thick-side compatibility: Made for drawer boxes with 5/8 to 3/4 inch sides, covering a range most standard undermounts cannot match.
• Full extension: The entire 18 inch drawer travels out to the cabinet face, giving complete access to rear contents.
• Integrated soft-close: A built-in damper catches the drawer near the end of travel and settles it shut without a slam.
• 100 lb capacity per pair: Handles loaded kitchen, bath, and utility drawers with confidence.
• Dynapro synchronization: Both slides track together without add-on hardware, keeping wide drawers shimmy-free.
• Face-frame and frameless compatible: One slide model works in either cabinet construction with the correct rear mounting hardware.

Where This Slide Earns Its Place

Most undermount slides are cut for 1/2 to 5/8 inch drawer sides — the standard dovetailed box. When a shop builds from 3/4 inch hardwood or full-thickness plywood, the 16mm version simply will not seat correctly. This Dynapro model is the 3/4 inch answer: the spacing, locking-device geometry, and box-width formula are all calibrated to the thicker side. It suits the shop that runs premium hardwood drawer boxes, builds from solid lumber, or specifies 3/4 inch Baltic birch throughout a project. At 100 lb per pair and full extension, it does not ask for any capacity trade-off in return for that extra thickness.

Construction and Finish

The Dynapro slide is steel with a zinc finish — a functional, corrosion-resistant surface that holds up through years of indoor service. The roller-bearing carriage delivers smooth, quiet travel under load, and the integrated soft-close damper requires no separate add-on or adjustment kit. Because the slide mounts fully beneath the drawer box, the zinc finish stays out of sight once the drawer is installed. Side clearance is 6mm, so the box width formula accounts for that clearance on each side.

Who This Is For

Custom cabinet shops building from 3/4 inch lumber or thick plywood are the primary buyer here. Designers who specify concealed slides for premium residential kitchens — where the drawer box is solid wood rather than a thin-wall production box — will find this the right specification. Contractors retrofitting or upgrading face-frame cabinetry with thicker drawer boxes also reach for this version. If the box is built to 1/2 to 5/8 inch sides, the standard Dynapro model is the better match; this 3/4 inch version is for the thicker stock specifically.

Frequently Asked Questions

The Right Concealed Slide When the Box Is Built Thick

Match this 18 inch Dynapro to a 3/4 inch drawer box built to Grass's specification, add the appropriate Dynapro locking devices and any rear mounting hardware your cabinet construction requires, and you have a full-extension, soft-close undermount rated for the load.