6", Crimped Wire Wheel Brush, Highly Specified Wire Grades, Constructed With Internal Holding Plate To Ensure Consistency & Safety, Even Balance Provides Smooth Performance, Carbon Steel, Knotted Wire Is For Heavy Material Removal, Crimped Wire Provides Flexibility For Light Removal Of Rust & Paint & General Cleaning, 5/8" To 1/2" Arbor, .014 Wire Size, Crimped Wire Style.