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The Grass Dynapro 21-inch soft-close undermount drawer slide brings full-extension travel and damped closing to both face-frame and frameless cabinet installations, with a 100 lb per pair load rating and a zinc steel construction built for daily production use.
A 21-inch drawer depth is a common target for kitchen base cabinets and bath vanities: deep enough for pots, pans, or organized bath supplies, and paired with this slide's full extension, the back of the drawer comes out to the opening so nothing gets buried. Cabinet shops running mixed face-frame and frameless production can source one slide for both, reducing the number of part numbers to manage. In face-frame installations, add the appropriate rear mounting brackets — they are not included and must be ordered separately — because the face frame sets the cabinet side back from the opening and the slide's rear end needs support. In frameless work, the slide mounts directly to the panel on the system hole pattern. The 100 lb per pair rating covers a standard fully loaded base drawer comfortably, from a pots-and-pans pull-out to a file or utility drawer built on a 21-inch box.
The Dynapro slide is built from steel with a zinc finish, a functional, durable coating suited to interior cabinetry in dry environments. The roller bearing system keeps the drawer running quietly across its full travel, which matters in kitchens and baths where a rough-sounding drawer undercuts the feel of the finished product. The soft-close mechanism is integrated into the slide — not an add-on damper — so damped closing is part of the unit from the start. Drawer side thickness must fall between 1/2 inch and 5/8 inch; the slide is engineered around that range, and the locking devices and front connection depend on it. Build the drawer box to the Grass Dynapro specification for the 21-inch nominal length, including the correct box width formula, rear notch, and any locking device drilling the front attachment requires.
Custom and production cabinet shops are the natural fit here: the Dynapro line is a professional undermount system, and the 21-inch length is a workhorse size that shows up on nearly every kitchen base cabinet layout. Designers specifying undermount slides for a concealed look get the clean underside and the damped close that clients expect from a premium installation. Contractors sourcing hardware for kitchen and bath remodels will find the face-frame compatibility useful on older American-built cabinets where frameless mounting is not an option. The sold-as unit for this SKU is a single left-hand cabinet member; confirm the full set your installation requires — the matching right-hand member, drawer members, and front locking devices — before placing the order.
The slide is compatible with face-frame construction, but the rear of the slide needs support that the face frame does not provide on its own. Add the appropriate Dynapro rear mounting brackets — sold separately — so the back end of the slide is properly anchored in a framed cabinet.
The slide is made for drawer sides between 1/2 inch and 5/8 inch thick. The locking device and front attachment are engineered around that range, so drawer boxes built with thicker or thinner sides will not seat correctly.
This SKU is a single left-hand cabinet member. A complete drawer installation requires the matching right-hand cabinet member, both drawer members, and front locking devices. Confirm the full set of components before ordering to avoid a second shipment.
The Dynapro platform supports the Grass Tipmatic Soft-close system, which combines push-to-open with the slide's existing soft-close action in one set. A plain mechanical push-to-open add-on would work against the soft-close mechanism, so only the combined Tipmatic Soft-close set delivers both functions on this slide.
Yes. Full extension on the Dynapro brings the drawer member out the full nominal length of the slide, so the complete interior of a 21-inch drawer box is accessible at the cabinet face. This is different from 3/4-extension slides, which leave the rear portion of the drawer inside the cabinet.
Full extension, integrated soft-close, a 100 lb pair rating, and compatibility across both cabinet construction types make the Grass Dynapro 21-inch slide a dependable choice for kitchens, baths, and production runs where the drawer needs to perform and the close needs to be quiet.
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