What are impact sockets most commonly used for? Here is what Wikipedia has to say on the subject:
"Hydraulic motor versions are rare outside of heavy industry. The sockets for impact duty (called impact sockets) are made with higher bulk and strength than those for hand-tool duty. They are typically finished in black oxide rather than the chrome plating typical of the hand-tool variety. The principal application of socket wrenches is to loosen and tighten fasteners such as nuts and bolts."
Generally speaking, these impact sockets are only used for high torque applications such as automotive use and similar applications.
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