Abstract: An apparatus for forming a container body from a metal blank has a ram, a blank holder, an annular die, a die holder, an insert and a plurality of ironing rings. The ram is centered about a longitudinal axis. The blank holder has an aperture through which the ram passes. The annular die is substantially axially aligned with the ram and adapted to allow the ram to pass therethrough. The die holder has a recessed portion adapted for receiving the annular die therein. The recessed portion has an annular, arcuate concave surface. The insert is located within the recess between the annular, arcuate concave surface and the annular die. The insert has a surface for supporting the annular die thereon opposite an annular, arcuate, convex surface in operative engagement with the annular, arcuate concave surface and swivelable thereon. The ironing rings are substantially axially aligned with the ram.