Pferd Inc. diamond-coated wire brushes are for removing localized heavy mill scale prior to welding in hard-to-reach areas. They are also for other heavy-duty surface conditioning applications and for blending machining marks and generating distinct scratch patterns. The brushes can be used on all metals, such as steel, stainless steel and aluminum. They have extended knot flag length, providing flexibility on uneven surfaces and complex geometries. The loosely twisted knots cover a large surface area, and they exhibit a good balance between aggressiveness and flexibility.