Flask case holder. Very custom.
Used in the prosthetic dental industry to make dentures. Wax model of denture is invested in a split flask inside a plaster matrix. The flask is placed two at a time stacked in a flask case. The case is a type of vise that tightens down on flasks with great pressure. The holder secures the case (vise) during tightening.
Style is custom made commercial industrial tools.