This tool is an expansion bit designed for copper tubing. It is usually used in air conditioning, refrigeration and other industries. When installing copper pipes, the inner diameter of the copper pipes is expanded by rotating the drill to connect other pipe fittings.
Air conditioner installation: Connect copper pipes between the indoor unit and outdoor unit
Refrigeration system installation: Connect the copper pipe of the refrigeration system
Other copper pipe connection: where it is necessary to expand the diameter of the copper pipe