Blum TANDEM plus BLUMOTION 563H Undermount Drawer Slide (21 in) Review (2026)
By The DIYPicks Team · Updated July 2026
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- Heavy drawers
- Kitchen reno
- Soft close
- Hidden slides
The gold standard for a kitchen renovation where drawers carry real weight and you want them invisible. Unforgiving of sloppy drawer boxes, but nothing else glides or closes this well.
Pros
- Slides hide completely under the drawer box, so you see clean wood sides and get the premium furniture look
- 100 lb rating plus buttery BLUMOTION soft-close handles loaded pot/utensil drawers without sag or slam
- 4-way adjustment lets you dial gaps and reveal perfectly after install — huge for face-frame reveals
Cons
- Front locking devices are required and NOT included — easy to forget and they add ~$3–4/pair
- Demands a precisely built drawer box (depth, notch for the hook) or it won't seat correctly
- Costs far more than side-mount slides, and length options are fixed — no field trimming
Specifications
| Type | Undermount, concealed, full extension |
|---|---|
| Length | 21 in (9–21 in available) |
| Load rating | 100 lb |
| Soft-close | Yes (integrated BLUMOTION) |
| Extension | Full extension |
| Drawer material | 1/2 in–5/8 in sides |
| Adjustment | 4-dimensional (height, tilt, side, depth) |