All Sonic sockets and bit sockets are intended for hand use only and not suitable for impact wrenches as these sockets are made of high quality chrome vanadium steel. The sockets can break due to the impact of the wrench. This can happen because the chrome layer on the socket comes loose or the sockets breaks and shatters, with all its consequences. This is the reason why Sonic impact sockets are made of chrome molybdenum. This type of steel is more robust and therefore the suitable socket for an impact wrench. Sonic offers a wide variety of impact tools.