Definition of "dustbrush"

Then erase any pencil lines with a good, soft eraser, rubbing gently, in only one direction. A dustbrush can be useful in removing any eraser crumbs.

2012, Caroline Joy Adams, An Italic Calligraphy Handbook, page 79

Matted fur drifted against skirting boards. Even as he worked a soft grey clump from the bristles of a dustbrush, Sucks to you, Boo, thought Tom.

2012, Michelle de Kretser, The Lost Dog, page 168