interesting tool, it is not shown in the "stretchers and strainers" fence and wire tools book by Conrad E. Bose, Alma, Nebraska.
then yet, the book was written in 1975, and research was not as simple as it is today.
reading the patent, tells a lot about the use of the tool,
"TOOL FOR FORMING WIRE JOINTS." patented on Nov. 23, 1909
patent # 940,823 issued to Abraham B. Probasco
this invention relates to a tool to be used for the purpose of completing the spliced joint whereby the ends of two wires are to be connected.
it is more particularly adapted for use on fence-wires and in such cases where close proximity of the ground or of other wires renders
convenient manipulation of a tool difficult.
again, thank you for showing it on tool talk, the place for learning.