Abstract: An improved wrench for adjusting fasteners. In one embodiment, the wrench comprises a body or a handle having at least two ends. One or more heads are located on at least one of the ends. The head has an inner and outer surface that form an opening large enough to accept a fastener. Pockets or recesses are located on the head inner surface and each pocket can accept at least one pin or ball. A cage or other securing device is sized to fit inside of the opening and movably secure the pins or balls in the pockets or recesses. Also, an insert may be provided to accept the fastener and whereby the insert is positioned inside the cage or securing device so that the insert can rotate with respect to the head. In one form of the invention, a retaining device may hold the insert in position.