Abstract: A die set having a pillar slidable in a bush which are secured to plates, to maintain alignment of the plates, by connector devices which comprises clamping members clamped by fasteners to the plates so that clamping surfaces abut abutment surfaces on flanges on the pillar and bush; and the surfaces are inclined so that the clamping members are driven radially outwards by the flanges if the pillar and bush seize together.