Abstract: A latch coupling includes a male and female member having complementary latching portions, all of which are dimensioned and positioned so as to assure that a first surface, which extends from the edge at which the two exterior surfaces are to meet, engage in their mating position before second surfaces which extend from the first surfaces during the insertion along the longitudinal axis of the male and female member. The complementary latching portions apply continuous mating forces to the first and second surfaces of the complementary shoulders when mated.

Abstract: An improved method of severing butt ends of aluminum billets using an improved blade design which peels the butt end from the billet. Die ring alignment prongs position the blade to leave a predetermined amount of metal on the die face and protect the blade from inadvertent contact with the die and die ring. The improved blade is provided with a cutting edge and angular wedge shape to facilitate peeling of the butt end from the billet.