Mercer Industries 186530 Knot Wire Wheel, 6" x 5/8" x 5/8"-11, Carbon Steel, For Angle Grinders Provides excellent abrasion and wear resistance, along with high flexing action Superior rotational balance reduces operator fatigue and improves tool life The loosely-twisted knots cover a larger surface area and are ideal for heavy-duty cleaning and surface conditioning Industrial wire brushes are made from high quality steel .020 Carbon Steel