Salice Progressa+ 21" Push-to-Open Full Extension 170 lb Undermount Drawer Slide, Zinc, G7U9P533XXF6

21 Inch Undermount Slide for Handle-Less Face-Frame Cabinets With Thick Drawer Sides

The Salice Progressa+ 21 inch push-to-open undermount slide is a concealed, full-extension runner built for face-frame cabinets with drawer sides up to 3/4 inch thick. Rated 170 lb per pair, it handles the heavy pulls that standard undermounts cannot, while its mechanical push-to-open mechanism keeps the front hardware-free.

Key Features

• Push-to-open mechanism ejects the drawer with a light press on the handle-less front, no pulls or knobs required.
• Full extension brings the entire 21 inch drawer box out to the cabinet face for complete access to the back of the drawer.
• 170 lb capacity per pair puts this slide well into heavy-duty territory, suited to oversized or heavily loaded drawers.
• 3/4 inch (19mm) drawer side compatibility makes this the right choice for boxes built from thick hardwood or plywood sides.
• Face-frame cabinet version designed specifically for traditional American face-frame construction.
• Steel construction with zinc finish provides lasting indoor durability beneath the drawer box.

Where This Slide Fits the Job

Handle-less cabinetry in face-frame shops calls for a specific combination: a push-to-open mechanism that works with the cabinet construction and a slide body engineered for thicker drawer sides. This Progressa+ fills that gap. A heavy 21 inch base cabinet drawer — a pots-and-pans pull-out, a file drawer, or a deep utility drawer in a mudroom or laundry — runs within this slide's 170 lb capacity without asking anything of the slide it cannot deliver. Face-frame construction is the assumed installation here, and the slide is built around it rather than adapted to it through add-on hardware.

The 21 inch length suits standard base cabinet depths where the drawer box runs close to the full interior. Because this is a plain push-to-open model, the drawer closes without damping — the motion is a mechanical eject on the open stroke, not a damped close. If a quiet, slowed close matters as much as the handle-less front, this model is not the right fit; choose a soft-close version from the Progressa+ line instead.

Build and Material Details

Steel members with a zinc finish handle the indoor service life expected from a concealed undermount. Because the slide mounts beneath the box, the finish is a functional corrosion barrier rather than a visible design element — nothing shows when the drawer is open. The 3/4 inch side-thickness rating is specific to this version of the Progressa+; the 5/8 inch side-thickness model is a separate SKU and the two are not interchangeable. Build the drawer box to the Salice specification for this series: nominal 21 inch length, the correct box width, bottom recess, rear notch, and the drilling pattern for Progressa+-specific front fixing clips. Salice fixing clips are series-specific and do not interchange with other brands or Salice lines.

Who Orders This Slide

Cabinet shops running face-frame production that specify handle-less fronts on thick-sided drawer boxes are the core buyer. At 170 lb per pair, the slide also appeals to designers and contractors putting heavy-use drawers — trash pull-outs, recycle bins, deep pantry drawers — into traditional face-frame kitchens. Homeowners renovating and building their own boxes from 3/4 inch hardwood will find this the version that matches their material rather than requiring them to resize their sides.

Frequently Asked Questions

The Right Slide for Heavy Handle-Less Work in Face-Frame Shops

A 21 inch concealed runner that pairs a 170 lb capacity with push-to-open and face-frame engineering covers a combination that most undermount lines do not offer as a single, purpose-built model — match the slide to your drawer side thickness, build the box to spec, and add the Progressa+ fixing clips your installation requires.