Sink a screw nut in the center of the under side to engage the regular tripod screw.
Through the opening E, the above two arms are introduced; and secured to the square of the rod by the screw nut.
It is provided with a cross handle (adjustable at any point along the length of the rod by means of a screw nut).
The bolt with its screw nut and washer were lying on the ground, where, apparently, they had fallen.
