The Tubing Brush is used for cleaning I.D. of tubing or seating nipples.
Looks similar to a wax cutter with the exception that larger holes are required to fit short sections of thin stranded cable.
NEW VERSION OF THE TUBING BRUSH
The new version of the tool utilizes a 3-part design. Cable sections are installed through the sleeve and the mandrel simultaneously through the aligned holes. Installing the fishneck presses the mandrel into the sleeve further, which locks the cable sections into position