Round Brushes are used to apply lubricant to chains and other moving surfaces.  The whisking action of the bristles evenly distributes the fluid as it reaches the contact surface.  Brushes can also help prevent dirt build up. 

This Round Brush features an aluminum holder with a 1/8" female NPT inlet to attach to a mounting shank or directly to a supply line.  The bristles are nylon (stainless steel is also available, part no. B536-22).