Specialty automotive sockets are for tightening and loosening nonstandard bolts and other fasteners. They are designed for use in automotive applications compared to all-purpose sockets that are suitable for a variety of fasteners. Sockets fit around and grip the entire head of the fastener so the socket won't slip off. They require the use of hand drive tools such as a ratchet or a breaker bar to turn the socket and rotate the fastener. Drive tools have a square nub called the drive that fits into the same size drive end of the socket for secure attachment to the hand drive tool.