The Universal base is a device which is placed between the press with its knockout and the shaped part of the die. Available in 4 different sizes according to the maxiumum depth of the format they will house, this device has become extremely useful to speed up size change-over operations thus reducing the weights to be handled and the cost of the investment when purchasing the die-sets: a universal base installed in each press can house an infinite number of different sized die-set kits. The bases are available both for dies with hideaway punches and for filler-box die-sets (mirror, SFS).