The Fin Fan Accessory snout utilizes Hose Stop Collets as the system's backout prevention device. Appropriate selection of collet size is critical to ensuring safe operation with proper backout prevention of the tool during industrial cleaning of heat exchangers, evaporators, condensers, and tub bundles.

The Collet Size Reference guide is located on the Vertical Drive Assembly, as well as the Fin Fan Accessory user manual.