Tool Head Cutter type CT- They are spring loaded & self expanding  for rapid removal of hard scale.

Tool Head Cutter type T -  It is for cleaning straight and curved tubes as found in boiler and air heaters for quicker cleaning scale.

Tool Head Cutter type YT- For fully blocked tube of deposit used with tool head cutter T type and CT type

Tool Head Cutter type WA- It has pivoted arms and cutter head which contact every part of tube due to centrifugal force. Used for fine cleaning of curved or bend tubes.