Chemtronics CCT Connection Tools. The CCT connection tools from Chemtronics have been designed for using with the Foccus MX precision cleaning pen. The connection tools are compatible with most common cleaners for fibre optic cleaning. Features and Benefits. Used with the precision cleaning pen gives fast cleaning of connectors on back plane and jumpers. Easy to use Magnetic backing Cleans UPC and APC connectors. Typical Applications. Use the connection tool with the cleaning pen within the fibre optic and telecommunications applications.