Is a manual pipe expander tool kit, often used for plumbing and HVAC applications to widen the ends of copper, aluminum, or soft steel pipes.
The kit typically includes a lever-style expander tool and several interchangeable heads of different sizes.
It is used to create a socket in a pipe, allowing another pipe of the same diameter to fit inside for a solder joint.
The tool is designed for manual operation, providing a non-slip grip and durability for long-term use.