Socket sets turn fasteners in a variety of applications, while bolt extraction socket sets remove stuck, rounded, and rusted nuts and bolts. Flex socket sets are hinged in the middle and can access fasteners in tight spaces. Insulated socket sets protect against electrical shock from live electrical circuits, while nonsparking socket sets won’t spark during use. Pass-through socket sets can turn fasteners on long threaded rod. Specialty automotive sockets are for automotive applications that involve nonstandard fasteners.