Abstract: An impact universal joint has a socket which receives a swivel head. A flat leaf spring with dependent members is connected to the upper face of the socket. The swivel head is substantially a sphere with spaced-apart lugs formed around a circumference of the sphere. Axially connected to the sphere is a body having an opening distal from the sphere. The opening receives a power driver. The socket has a cavity formed therein which cooperates with the spherical swivel head. The cavity has a plurality of spaced-apart channels formed therein dividing the cavity into respective segments. Each channel of the cavity receives a respective lug of the swivel head. Each lug has an outer face which is curved to cooperate with the outer wall of the respective channel. Each lug further has a pair of opposite driving faces which are convex to allow the spherical swivel head to swivel within the socket without binding.