This is a Fine Grit Sup-R Sander from Midwest Products Co.
FEATURES: A revolutionary system for sanding that virtually lasts forever.
The tungsten carbide sanding surface will not tear or wear out like
sandpaper, and the lightweight plastic design greatly reduces hand
Use on a variety of surfaces
If the tungsten carbide surface fills up with sanding dust, clean the
surface with the included brass wire brush and continue sanding.
Sands almost anything-woods, metals, plastic, foam, fiberglass,
drywall, Corian, tile and even brick.
INCLUDES: One Fine Grit Sup-R Sander
SPECS: Length: 5¼" (133mm)
Width: 2¾" (70mm)
Height: 1½" (38mm)