These tools are similar in operation to the Stiff Arm Winged Tools, but patented Cone Cutters are attached onto flexible arms. These tools are used in typically very large vertical pipes and are used in tube cleaning pipes from top to bottom

Tube I.D. Wing Tools-Flexible Arm Cutter Model Spare Cone Cutter Model
mm inch
100.0-309.0 3.15/16-12 PM-WTF-3938 PM-SCT-937