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This is the right-hand slide of Grass's Dynapro concealed undermount system in the 21 inch length — full extension, integrated soft-close, and rated 100 lb per pair. Sold as a bulk single for shops that stock cabinet and drawer members by the case, it suits drawer boxes built with 1/2 to 5/8 inch sides in both face-frame and frameless cabinets.
A 21 inch Dynapro slide is the right length for standard kitchen base-cabinet drawers where the interior depth runs roughly 20 to 22 inches. That covers the pots-and-pans drawer under the cooktop, the deep utensil drawer beside the range, and the lower drawer in a stacked three-drawer bank. At full extension, nothing stays buried at the back — the whole box comes out level with the cabinet face. The 100 lb per pair rating covers those drawers loaded to normal working weight without stepping up to a heavy-duty slide. Built-in synchronization means wide drawers track straight without shimmy, which matters on a 36 inch base cabinet where two 21 inch slides carry a single wide box.
The Dynapro slide runs on a roller-bearing carriage in a steel housing with a zinc finish. The zinc plating protects the steel through years of indoor cycling; the roller bearing system keeps travel quiet and smooth under load. Because the slide mounts concealed beneath the drawer box, the finish is functional rather than decorative — it will not be visible once the drawer is installed. The integrated liquid damper is built into the slide body, not a separate add-on clip, so the soft-close action is consistent across the life of the slide.
Production cabinet shops are the natural buyer here. Bulk singles let a shop stock right-hand and left-hand 21 inch slides by the case and pull matched pairs at the bench, keeping both SKUs lean in the bin rather than ordering prepackaged pairs at a fixed ratio. This SKU also suits renovation contractors retrofitting existing face-frame cabinetry — the Dynapro's face-frame capability, combined with the series' available rear mounting brackets, makes it a clean fit for traditional American cabinet construction as well as frameless Euro-style boxes. Designers specifying concealed slides for a premium kitchen build can call the Dynapro by name; it is the same runner family that carries the Vionaro drawer system.
No. This is the right-hand member only. Order the matching left-hand 21 inch Dynapro slide separately — one left and one right make a complete pair for a single drawer. Two right-hand slides will not work together.
Build the drawer box to Grass's published specification for the Dynapro series: 21 inch nominal length, the correct box width for the series' side clearance, drawer sides from 1/2 inch to 5/8 inch thick, bottom recess, and rear notch with the drilling for the Dynapro front locking devices. An off-spec box will not seat correctly on the slides.
The front locking devices are sold separately as Dynapro-specific accessories. They are not interchangeable with locking devices from other brands or series. Order Dynapro locking devices alongside the slides when building out a new run of drawers.
Yes. In face-frame cabinets, the slide's rear end needs support from Dynapro rear mounting brackets, which are sold separately and are series-specific. Frameless cabinets take direct side-panel mounting and do not require the rear brackets.
Adjustment lives in the Dynapro front locking devices, not the slide body itself. Depending on which locking devices are specified, adjustment can reach up to four dimensions — height, side, tilt, and depth — making it practical to true up fronts after the drawers are hung.
Stock the right-hand and left-hand 21 inch Dynapro slides in equal counts, add the series locking devices and the rear brackets your cabinet construction calls for, and pull matched pairs at the bench — no kitting delay, no second shipment for forgotten hardware.
Sold In: 364 Each