Designed to easily remove a broken 3.5mm headphone plug from a headphone jack.
The thin walls of the cylindrical working end slip between the jack housing and the broken piece, physically isolating the piece from any friction against the jack walls. The split in the cylinder allows for manufacturing differences and acts as a kind of cylindrical pliers to grip the broken piece.
This tool is designed for repair professionals, and will pay for itself with the repair of a single device. With careful use it may survive to repair many devices. A bit of research into proper use techniques is highly recommended. The product video below gives a good demonstration of the GripStick in action.