For grinding steel Especially suitable for cleaning tubes, gratings, sleeves and cylinders, for deburring horizontal bore holes and for regulating flow velocities in tubing systems These brushes can be extended with an adapter or used on machines thanks to their external thread Versatile Highest quality For grinding steel Especially suitable for cleaning tubes, gratings, sleeves and cylinders, for deburring horizontal bore holes and for regulating flow velocities in tubing systems These brushes can be extended with an adapter or used on machines thanks to their external thread Versatile Highest quality