1/2" Crimped Wire End Brush for Carbon Steel are best for use on corrosion-resistant or non-ferrous materials. They are also used to clean surfaces and to create a better conductive area for attaching electrical connections. The crimped wire style is suited for light to medium duty jobs. This end brush has 1/4" shank for easy use on powered drills and other pneumatic tools. Carbon steel brushes can be used on ferrous metal, concrete, masonry, and building materials. Crimped wire brushes provide flexibility for light or medium duty applications and can be used on a very broad range of applications, especially on parts that could be damaged by the impact of the more aggressive twist knot product.