Roto 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 Roto Brush features a brass shank with a 1/8" male NPT inlet.  The bristles are stainless steel (nylon is also available, part no A2257-NW1). 

The shank is adjustable to accommodate up to 1/2" of bristle wear.  A replacement brush is available without mounting hardware.