knot brush

knot brush

A brush having its bristles grouped in one to three thick knots (of round or oval shape); used for distempers.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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For weld preparation and finishing, the catalog covers wire wheels, cable twist and knot brushes, cup brushes, scratch brushes and welders tooth brushes plus a wide selection of mini-grinder brushes, miniature brushes, end brushes, abrasive filament and encapsulated brushes for other welding-related chores.