UP-B10: This handy tool has both telecom and datacom applications. It is actually two tools in one to save space in your tool pouch. One side is a standard 7/16" (black finish) hex socket tool used to open and close most telecommunication boxes and enclosures (telco cans and demarcation products). The other side is a 3/8" hex (silver finish) socket used to tighten standard binding post terminals.