Round Shank 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 Adjustable Round Shank Brush features an aluminum holder with a 1/8" male NPT inlet to attach directly to a supply line.  The bristles are nylon (stainless steel is also available, part no. A2257-SR1). 

The brush shank is adjustable to accommodate up to 1/2" of bristle wear.