Bolt extraction impact socket sets are for use with impact power tools to create high torque in removing stuck, rounded, and rusted nuts and bolts. They fit around and bite into and firmly grip the fastener head as the socket is turned and the fastener is removed. Impact power wrenches have a square nub called the drive that fits into the same size drive end of the socket for secure attachment to the drive tool. The impact sockets are constructed to securely attach to the impact tool so the socket won’t fly off the drive of the impact wrench during use. They can handle the higher torque and vibration generated by an impact power wrench when turning a fastener.