28963 Features: -Cup brush. -Ideal for surface cleaning on brass and brass alloys, copper, precious and semi-precious metals, stainless steel, semi-precious stones, plastic and wood. -Acid-resistant and electrically neutral, thus suitable for working with electronic components. -Shank size: 0.93". Product Type: -Coated Abrasives/Wire Brush Abrasives. Generic Dimensions: -Overall dimensions: 0.19" H x 10.4" W x 10.4" D, 0.5 lbs. Dimensions: Overall Product Weight: -0.5 Pounds.