A general-purpose socket set with a 3/8-inch square drive provides a versatile tool collection for various mechanical applications. These sets typically include a range of sockets in both metric and SAE sizes, along with extensions, ratchets, and other accessories designed to loosen or tighten nuts and bolts. A common example would be a set containing sockets ranging from 8mm to 19mm and from 5/16 inch to 3/4 inch, packaged with a quick-release ratchet handle and several extension bars.
The 3/8-inch drive size represents a balance between the lighter-duty 1/4-inch drive and the heavier-duty 1/2-inch drive, making it suitable for a broad range of tasks from automotive repair to general household maintenance. This versatility contributes to the enduring popularity of the 3/8-inch drive as a staple in toolboxes for both professionals and DIY enthusiasts. Historically, standardized socket sets have streamlined mechanical work, replacing less efficient methods of fastening and loosening threaded components.