Hand sanding pad with hand grip for common 1/3 sheet sandpaper as used by many electric sanders.

Sandpaper is held in by the slots on each end, although they may need a thin piece of card to act as a wedge if the paper keeps coming loose.

MakerBot

MakerBot Replicator

No

No

0.2

20%

I printed this in ABS. There was a little warping on the corners so I would suggest using a brim or ears.