An adjustable die for drawing polygonal tube, rod, bar, or the like having a casing with a polygonal recess therein, a plurality of adjusting wedges arranged one to each side of the polygonal recess, and a plurality of die blocks having a principal angle equal to the principal angle of the polygon and a forming surface disposed substantially perpendicularly to the bisection of the principal angle of the draw block. Each block is disposed in the recess to be primarily supported by an adjusting wedge, and the wedge and block assembly is disposed against a backing plate to be axially supported against the forces of drawing.