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This Grass Dynapro 18 inch undermount slide is the version engineered for drawer sides from 5/8 inch up to 3/4 inch thick — a distinct model from the standard 5/8 inch version, with the slide spacing, locking-device geometry, and box-width formula sized for heavier drawer material. It delivers full extension, integrated soft-close, and a 100 lb per pair capacity in a fully concealed runner that suits both face-frame and frameless cabinets.
The 3/4 inch side-thickness version of the Dynapro is the right call when the drawer box is built from hardwood stock or thick plywood rather than the more common 5/8 inch dovetailed material. Shops running 3/4 inch maple, walnut, or birch box sides — whether for a furniture-grade kitchen, a high-end bath vanity, or a built-in storage piece — need this version, not the standard model. The two are separate products; putting a 5/8 inch slide under a 3/4 inch box creates a fit problem that shows up at installation, not at the order desk.
At 18 inches, the slide length suits the most common base-cabinet drawer depth. Pair two of these — one per side — for each drawer in the run.
Dynapro runs on a roller-bearing carriage inside steel members finished in zinc. The zinc finish is a functional, corrosion-resistant coating suited to indoor cabinetry; because the slide mounts beneath the drawer box, it stays out of sight once the drawer is closed. The integrated soft-close damper is built into the slide body, not added on, so there are no separate damper clips to source or position.
Custom cabinet shops and furniture makers building boxes from thick hardwood or 3/4 inch plywood are the primary buyers. Designers specifying face-frame kitchens with traditional-style drawer boxes appreciate that this slide covers both construction types without a model change. Contractors retrofitting an existing run of thick-sided drawers will also find this the direct fit — provided the box is built or rebuilt to Grass's Dynapro specification for this side-thickness version.
This version is rated for 5/8 inch to 3/4 inch sides, so a 5/8 inch box is within range — but if all your boxes are 5/8 inch, the standard Dynapro version sized for 1/2 to 5/8 inch sides is the more precise fit. Check the box-width formula for each version before building.
The slide itself fits both cabinet types, but face-frame installations require Dynapro-specific rear mounting brackets at the back of the cabinet. Those brackets are sold separately and are specific to the Dynapro series — they do not interchange with rear brackets from other undermount brands.
Dynapro front locking devices are series-specific accessories. Confirm whether they are included with this SKU or need to be added to your order separately before finalizing the purchase.
Confirm the sold-as unit on the product page before ordering. Each drawer requires one slide on each side, so a single-slide listing means you need two per drawer.
Yes. Undermount slides are engineered systems — the box must match Grass's published specification for this Dynapro version: nominal 18 inch length, the correct box-width formula for the 3/4 inch side-thickness variant, bottom recess, rear notch, and the drilling pattern for Dynapro locking devices. A standard off-the-shelf box built to a different spec will not seat correctly.
When the drawer box is built from 3/4 inch material, this is the Dynapro version that fits — match it to the spec, add the series hardware your cabinet construction needs, and the drawer runs clean from day one.
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