A level shifting circuit comprises a first low power, low speed level shifter 30 and a second high power, high speed level shifter stage 31. The base material includes a first layer positioned on a side of the pressure-sensitive adhesive layer and a second layer positioned on an opposite side of the pressure-sensitive adhesive layer. Additionally, the pawls are prevented from being mis-shifted by the switching mechanism. The differential stretching compensates for longitudinal shortening of the metal strip in forming the profiled section in the roll former.