Westward 4EDH1 Cup Brush Light-cleaning brushes have carbon steel crimped-wire bristles. The crimped-wire design provides a balance between cleaning power and surface protection. They effectively remove dirt, flaking paint, oxidation, and other contaminants without damaging delicate surfaces like carbon steel, iron, and even wood. The flexible nature of the crimped wires allows them to conform to uneven surfaces, ensuring a thorough clean even in hard-to-reach corners and details. Shank Length / 1/8 inch Bristle Type / Crimped Brush Diameter / 5/8 inch Bristle Length / 1/4 inch Bristle Diameter / 0.005 inch Maximum Operating Speed / 37,000 RPM