170 Lb Capacity And Face-Frame Fit: Salice Progressa+ 21 Inch Soft-Close Undermount

The Salice Progressa+ 21 inch undermount drawer slide delivers full-extension travel and integrated Smove soft-close at a 170 lb per pair capacity — a combination rarely found in a concealed runner that also installs directly into face-frame cabinets.

Key Features

• 170 lb weight capacity per pair — handles oversize and heavily loaded drawers with a safety margin that standard 90 to 100 lb undermounts can't match.
• Full extension — the entire drawer travels to the cabinet face, putting the back of the box within reach on every open.
• Integrated Smove soft-close — a built-in liquid damper catches the drawer near the end of travel and settles it shut silently.
• Face-frame cabinet compatibility — engineered for traditional American face-frame construction, not limited to frameless casework.
• Fits drawer sides up to 3/4 inch thick — supports boxes built from 3/4 inch hardwood or plywood without a separate thick-side model.
• Steel construction with zinc finish — durable for years of indoor service while staying concealed beneath the drawer box.

Where This Slide Earns Its Place

Most undermount slides top out at 90 to 110 lb per pair, which works fine for the average spice or utensil drawer. The Progressa+ is built for the loads that push past that range: a wide pots-and-pans pull-out stuffed with cast iron, a file pull-out carrying hanging folders and heavy binders, or a two-bin waste-and-recycle drawer in a traditional framed kitchen. At 21 inches, it suits the typical base-cabinet depth and gives the drawer a meaningful amount of real rear-of-the-box access. Because it's rated for face-frame construction — a common limitation in this capacity tier — it covers renovations and additions to existing kitchens where frameless-only slides are a non-starter.

Construction and Finish

The Progressa+ runs on a steel chassis with a zinc finish, which keeps the hardware protected through everyday indoor use. Because the slide mounts beneath the drawer box and stays hidden when the drawer is open, the zinc finish serves a functional rather than decorative role. The integrated Smove damper is a liquid-damper mechanism, the same system used in Salice's Futura line, providing a controlled and quiet close without an external add-on. Build the drawer box to Salice's published specification for the Progressa+ series: the correct nominal length, box-width formula for the clearance requirement, bottom recess, rear notch, and locking-device drilling. Front locking devices are series-specific Salice Progressa+ parts — verify whether they are included with this SKU or sold separately before ordering.

Who This Is For

Shops building traditional face-frame kitchens and bath vanities who want concealed slides with serious load capacity will find the Progressa+ fills a gap that many undermount programs leave open. It's also a practical choice for designers specifying high-end renovations in older homes where the existing cabinet box is face-frame and can't be swapped out. Contractors working on kitchen remodels who need a single undermount SKU that handles both standard and heavy-duty drawers in the same framed cabinet run will avoid the need to mix slide families mid-project.

The Right Slide for Heavy-Duty Face-Frame Work

When the drawer is oversize, the cabinet is face-frame, and soft-close is expected, the Progressa+ at 170 lb per pair handles the load and the installation challenge in one SKU.