PFERD 84032 Power M-Brad Double Stem/Double Spiral Tube Non-Wire Brush, Nylon/Silicon Carbide Bristles, 7/8' Diameter, 0.040' Wire Size, 3' Shank Length, 5-1/2' Length, 80 Grit (Pack of 2): Abrasive Spiral Brushes: Industrial & Scientific. PFERD 84032 Power M-Brad Double Stem/Double Spiral Tube Non-Wire Brush, Nylon/Silicon Carbide Bristles, 7/8" Diameter, 0.040" Wire Size, 3" Shank Length, 5-1/2" Length, 80 Grit (Pack of 2): Abrasive Spiral Brushes: Industrial & Scientific. PFERD power M-Brad abrasive filament double stem/double spiral tube non-wire brush. Cutting action is non-destructive to the part and will not alter bore dimensions or disturb delicate surface finishes. Recommended for conditioning internal bore holes or tubes as well as cleaning threads and burrs at cross-holes. Side action removes cross-holes sharp edges and corners, as well as slivers produced when drilling close-tolerance hard metallic and non-metallic parts. M-Brad is a 6.1 nylon monofilament that evenly encapsulates various abrasive grit particles on the surface as well as throughout the nylon filament. The flexibility of strands flowing over, around and into contours makes it uniquely effective if deburring complex parts. Consistent, gradual cutting action allows precise control. from cosmetic surface preparation on brass or soft aluminum to edge-blending on materials as tough as titanium and carbide. M-Brad brushes are ideal for surface conditioning applications on all materials including wood, glass, steel and nickel alloys. M-Brad filled brushes yield longer tool life than non-woven synthetic abrasive products. This unique M-Brad filament is suitable for both wet and dry applications, although the use of coolant is recommended. M-Brad won't degrade the dimensions of the workpiece, which reduces scrap and fill welding. 1/4-inches stem diameter. Measures 7/8-inches diameter. -1/-inches brush part length. Has a jagged crystal structure and is easily friable. It is the most common grain used on light to heavy deburring applications on ferrous and non ferrous alloys. Uses in industries area: automotive, transportation, electronics, aerospace, nuclear, textiles, food services, woodworking/furniture, construction, medical, shipbuilding, fabricating, defense, energy and plastics. . . .