Pompeyexile Is it for breaking open coconuts or some other hard nut/fruit? Or what about pushing out a bearing?
Gagaryn The knurled knob is eccentric to the through bolt. The bright part looks like it has a sharpened face. It looks almost like some kind of lathe tool holder - albeit quite an agricultural one.
Gagaryn Close but no cigar. Hmm, some kind of architrave scriber or chamfering thingamajig? Definitely something for cutting or carving.