MADE IN THE USA: Weiler Power Cup Bushes are proudly made in the USA at our factory in Cresco, PA ROBUST CONSTRUCTION: Constructed with an internal steel plate that has equally spaced knot holes around the perimeter to minimize vibration and extend life INDUSTRIAL GRADE CARBON STEEL WIRE FILL: Featuring heat treated, high tensile steel wire that has been drawn to the most exacting industry standards for superior fatigue resistance and brushing action IDEAL FOR DEMANDING CLEANING APPLICATIONS ON RELATIVELY FLAT SURFACES: Heavy duty cleaning prior to welding, weld scale and corrosion removal, rust and paint removal, roughening, deburring USE ON RIGHT ANGLE GRINDERS: Fits most standard power angle grinders with 5/8"-11 UNC thread