An induction heating device for a shrink-clamping and/or unshrink-unclamping of tools into and/or out of tool holders has an induction heating unit with at least one first inductor and at least one second inductor, which is preferably realized separately from the first inductor, wherein the first inductor and the second inductor are configured to respectively expand at least a portion, in particular different portions, of the tool holder by inductive heating in a shrink-clamping and/or unshrink-unclamping process, and has an electric supply unit,
wherein the inductors are configured to output respectively different energies to different subregions of a tool holder, which are in a heating operating respectively encompassed by the inductors, as one of the inductors has more windings than the other inductor, in particular by at least 10%, preferably by at least 20% and preferentially by at least 30% more windings, and/or as the electric supply unit is at least configured to operate the first inductor and the second inductor in different manners.