Blum 554H Tandem Edge 21" Soft-Close 7/8 Extension 100 lb Undermount Drawer Slide, Zinc, 01727399

Integrated Soft-Close And Face-Frame or Frameless Fit in One Economy Undermount

The Blum TANDEM Edge is a 21 inch concealed undermount drawer slide that delivers integrated BLUMOTION soft-close and a 100 lb per pair capacity without stepping up to a full-extension model. Designed for drawer boxes with 1/2 to 5/8 inch sides, it suits both face-frame and frameless cabinet construction.

Key Features

• 7/8 extension with minimal extension loss — opens nearly the full drawer length while keeping the price below full-extension models.
• Integrated BLUMOTION soft-close — Blum's damped closing mechanism catches the drawer near the end of travel and settles it silently shut.
• 100 lb capacity per pair — sized for loaded kitchen and bath drawers.
• Face-frame and frameless compatibility — one slide works in both cabinet constructions with the correct installation hardware.
• Roller bearing, zinc-finished steel — quiet travel and durable indoor service in a concealed profile.

Where This Slide Earns Its Place

The TANDEM Edge sits at the intersection of concealed-slide convenience and budget discipline. Production shops running frameless casegoods and kitchen remodelers working in face-frame kitchens both reach for it when a fully concealed, soft-closing drawer is the spec but the per-unit cost of a full-extension slide is harder to justify. At 7/8 extension, the last inch or so of the drawer stays inside the cabinet at full open — a fair tradeoff on most kitchen and bath drawers where the contents sit toward the front anyway. It is also the right call on shallower base cabinets where a full-extension slide would demand more rear clearance than the box allows.

Steel, Zinc, and Roller Bearings

The slide is built from steel with a zinc finish that protects through years of indoor cycling. Because the TANDEM Edge mounts completely beneath the drawer box, the zinc finish is functional rather than decorative — it handles the load cycles and stays hidden. Blum's roller-bearing carriage keeps travel smooth and quiet under the rated load, consistent with the performance the 563H TANDEM plus BLUMOTION series delivers at full extension. The 3/16 inch side clearance is the same spec across the Blum undermount family, so shops already building to Blum's box formula do not need to adjust their process.

Who Builds With the TANDEM Edge

This slide fits two buyer profiles well. Production cabinet shops that need a concealed soft-close runner on mid-grade lines — where the customer sees and feels the quiet close but the bill-of-materials needs to stay lean — get a Blum-quality close without the full-extension premium. Custom builders and remodelers who are matching into an existing Blum undermount install, or who are specifying concealed slides in a bathroom vanity or bedroom furniture piece where full rear access is not a priority, get the same fit and feel as the broader TANDEM family. For drawer boxes with 3/4 inch sides or applications that genuinely need the full drawer open, other slides in the Blum line cover those needs instead.

A Soft-Close Concealed Slide Built for the Middle of the Spec

The Blum TANDEM Edge 21 inch gives shops and builders the quiet close and clean look of a premium undermount at a step down in cost from full extension — a practical fit for the drawers where 7/8 travel is enough and the budget needs to move to the next cabinet.