Abstract: A U-shaped clamp fastens to a boat windshield frame with set screws and incorporates a protruding member having a recess with a hemispherical radius at the inner end and a straight bore tapped with internal threads at the outer end. A ball having a matching radius is held captive in the recess by a nut that engages the internal threads. The nut has a partial radius that matches the radius of the ball. A slotted elongated arm fastens to a mirror at the slotted end, and has an elbow at the other end that passes through a large opening in the nut and fastens to the ball. Another embodiment has a ball mounted on the protruding member that mates with a cylindrical ball socket member having a ledge at one end adapted to engage the ball. The ball socket member has a split that is squeezed together to hold the ball. Another embodiment has a cylindrical pivot member rather than a ball-socket pivot. In one embodiment the protruding member is formed as an integral part of the boat windshield frame.