A collection of sockets designed for use with a 38.1 mm (1.5 inch) square drive size typically includes a range of sockets in various sizes (both metric and SAE) along with extensions, universal joints, and adapters to accommodate a wide array of fasteners. This assortment is frequently housed in a sturdy case or toolbox for convenient storage and organization.
Heavy-duty tools of this type provide the high torque necessary for loosening or tightening large fasteners commonly encountered in demanding applications such as heavy equipment maintenance, automotive repair, and industrial settings. The robust design of these components ensures durability and reliability under significant stress. Historically, the development of such toolsets reflects the increasing mechanization and complexity of machinery, necessitating tools capable of handling greater loads and forces.