What is a universal joint used for in automotive work?

A universal joint, often referred to as a u-joint, is primarily utilized to allow a socket wrench to maneuver around obstructions, enabling the mechanic to access fasteners that may not be directly aligned. This flexible joint allows for angular movement, which is essential when dealing with tight spaces or awkward angles in a vehicle, thereby simplifying the process of loosening or tightening bolts.

This design is crucial in automotive work, where components may be positioned in a way that necessitates a deviation from a straight line in order to effectively use tools. The universal joint thus becomes a vital component in ensuring that a mechanic can work efficiently and effectively.

While other options may imply uses that involve tools or connections in automotive scenarios, they do not accurately reflect the primary function of a universal joint in facilitating tool access around obstructions.