Intro to Millwright Practice Exam 2025 - Free Millwright Skills Practice Questions and Study Guide

The adjustable wrench is designed to be versatile and accommodate fasteners of various sizes. It features a movable jaw that can be adjusted by turning a knurled thumb screw, allowing the user to open or close the jaw to fit the specific size of the nut or bolt being worked on. This capability makes it ideal for situations where you may not have the exact size of a fixed wrench available, providing convenience and efficiency.

In contrast, the open end and box end wrenches are typically designed to fit specific sizes of fasteners and lack the ability to adjust. While they are effective in their respective applications, their functionality is limited to the predetermined sizes. A torque wrench, on the other hand, is specifically used for applying a specific amount of torque to fasteners and is not designed to fit multiple sizes. Therefore, the adjustable wrench stands out as the tool that directly offers the flexibility needed for different fastener sizes.