Forms briquets to be tested in any ductility-testing machine. Four accurately machined interlocking brass segments are interchangeable with same parts from different molds; no parts identification marks are needed for matching. End pieces, designed to hold specimens being elongated, are provided with mounting holes. Requires H-1090 or H-1090.3 base plates. Perfectly flat surface of brass plate gives uniform contact with bottom surfaces of either one (single mold plate) or three (triple mold plate) H-1080 or H-1030 molds. Meets ASTM D113, D5892, D6084, AASHTO T51.