The DS321 is a 7-amp, 3 by 21-inch belt sander with a three-position adjustable handle and an angled belt that sands closer to adjoining surfaces. A retractable hood exposes the top of the belt so you can sand in tight spaces, and a low-profile body lets you sand vertical surfaces. An on-board dust bag collects the worst of the mess.
The 3 by 21-inch belt is the standard size, which means the widest choice of replacement belts at any hardware store. Compared with the SKIL 7510-01, which takes shorter 3 by 18-inch belts, the DS321 has more belt area and runs a little cooler. The handle positions matter in practice, because the best angle for a flat tabletop is not the best for a door edge.
Ownership details: keep the belt tracking centered, watch for belt wander and clean the dust bag often. Lower the sander onto the work with the belt already spinning and lift it off the same way, because a spinning belt dropped flat is the classic source of a gouge. It is a single-speed tool, so you cannot slow it for delicate work, which is the main compromise against the variable-speed models. For a homeowner doing a few projects a year, it is the safest buy.
What works
- Standard 3 x 21 in belt is easy to find
- Three-position handle for comfort
- Angled belt sands close to edges
- Low profile for vertical surfaces
Watch out for
- Single speed, no slow setting
- Stamped dust bag clogs quickly
Spec sheet
- Motor
- 7 amp corded
- Belt
- 3 x 21 inch
- Handle
- 3-position adjustable
- Edge
- Angled belt for closer sanding
- Dust
- On-board bag





