What is the primary use of a combination wrench?

The primary use of a combination wrench is to provide a tight grip with an open-end jaw and a box end. This tool is designed specifically for versatility, as it features both an open-end side, which allows quick engagement with fasteners, and a box end side that offers a stronger grip for more stubborn or high-torque fasteners. This design helps technicians work efficiently in various situations, providing the capability to tighten or loosen fasteners with different shapes and sizes.

The open-end side is excellent for situations where rapid adjustments are needed, while the box end allows for a more secure fit on the fastener, reducing the risk of slipping. Combination wrenches are commonly used in automotive and mechanical work, where both types of fastener engagement can be crucial.