Nylon filament brushes contain an abrasive grain designed for non-sparking application. Non-rusting, long life span allowed by specially designed nylon filament material. For use when performing surface treatment, deburring and other cleaning applications on metal, wood and other surfaces. Ø6mm Shaft size designed to fit any standard sized drill chuck. Contents: Filament Cup brush; Ø50mm, Circular Filament Brush; Ø50mm, 75mm, Filament End Brush; Ø25mm, Filament Strip Brush; Ø100mm.