In the production of expanded material from a sheet material strip, in particular, a metal strip, cuts are introduced into the material strip, by way of at least one cutting unit, using laser, water or electron streams, whereupon the material strip is subjected to a drawing by way of a drawing device. The holder may be in the general form of a rectangular box structure with a back side wall with a hanger attached, a right and a left side wall attached to the back side wall, a front side wall attached to the two side walls, and a bottom wall to form an open top interior chamber. A seat cushion lock mechanism may be provided in such interlocking element so as to permit automatic locking and unlocking of the seat cushion to and from a vehicle body by folding the seat back downwardly and upwardly.