PREMIUM QUALITY: High-quality steel wire is 100% inspected to meet demanding quality specifications. SPECIFICATIONS: Abrasive Wire cup brush operates at speeds up to 12,500 RPM and is suitable for angle grinders with 5 / 8'' -11 threaded arbor for easy removal of severe rust, paint loss, corrosion and scale. CONTENTS: You will 10 pieces of Premium Heavy-Duty Knotted Wire Cup Brush for Metal. CUP DESIGN: THICK, Knotted Cup design is ideal for heavy-duty, aggressive surface conditioning on expansive surface areas | Thinner, Crimped CUP design delivers maximal flexibility and fatigue resistance while also minimizing scratch risk in expansive metal surface areas APPLICATIONS: Roughening, planing, deburring, honing, structuring, descaling, paint, stripping, weld seams, grinding, polishing and surface treatment of metals.