$1.00
Four (4) bolts are required to attach the rotating base to the cross base.
See FAQ below in description
Dims Thumbscrew Knob: 3″ x 3″ x 1.5″
Four (4) bolts are required to attach the rotating base to the support base/tube.
Dims Thumbscrew Clip: 0.5″ x 0.25″ x 2.5″