These tools are used to clean tubes that have sharp bends in them. They consists of a brush or cobalt tip mounted on a piece of flexible shaft so the tool can negotiate the bend. Wheel Brush Tools

Wheel Brush Tools Tube I.D.
mm inch
PM-WBT-813B 20.6-25.4 13/16-1"
PM-WBT-813SS 20.6-25.4 13/16-1"