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.
The bolt with its screw nut and washer were lying on the ground, where, apparently, they had fallen.
It is provided with a cross handle (adjustable at any point along the length of the rod by means of a screw nut).
