Which tool serves as a socket handle used when flexibility is needed?

The hinge handle is a tool designed to provide a flexible connection for a socket or fitting, allowing for easier maneuverability and access in tight or awkward spaces. Its structure typically features a pivot point, which facilitates the adjustment of angles, making it particularly useful in applications where flexibility is essential. This characteristic allows users to apply torque effectively while still maintaining a comfortable grip, which is crucial for tasks that require precision and control.

In contrast, other tools like hand screw clamps are primarily used for securing items together and do not offer the same flexibility. Groove joint pliers are designed for gripping and turning, while a grease gun is intended for lubrication purposes, neither of which serve the purpose of a socket handle where flexibility in movement is required.