The wooden block wire brush contains 6 x 19 rows of high carbon steel bristles used for cleaning rust, scale, solder chips, removing paint and dirt, as well as to clean surfaces. Has a threaded opening to accept mop stick. 6 rows wide x 19 rows deep on a wooden block1 inch length high carbon steel wire bristlesFor cleaning rust, scale, solder chips, removing paint and dirt, as well as to clean surfaces. Contains a threaded opening to accept mop sticks.