A socket set designed for use with fasteners measured in millimeters typically includes a variety of sockets in assorted sizes, a ratchet handle, and possibly extensions or other accessories. The “1/2-inch drive” designation refers to the size of the square recess in each socket that engages with the square drive of the ratchet or extension. This size is a common standard for general automotive and mechanical work, offering a balance of strength and maneuverability.
This configuration of tools provides a versatile and efficient means of tightening or loosening nuts and bolts. The range of socket sizes accommodates various fastener dimensions, while the ratchet mechanism allows quick and continuous operation without needing to remove and reposition the tool after each turn. The robust 1/2-inch drive size is suitable for applications requiring significant torque, making this type of set a valuable asset in numerous professional and DIY settings. Its evolution and standardization have contributed significantly to improving mechanical efficiency across many industries.