We consider the physics of enhancons as applied to four dimensional black h
oles which are constructed by wrapping both D-branes and NS-branes on K3. A
s was recently shown for the five dimensional black holes, the enhangon is
crucial in maintaining consistency with the second law of thermodynamics. T
his is true for both the D-brane and NS-brane sectors of these black holes.
In particular NS5-branes in both type IIA and IIB string theory are found
to exhibit enhangon physics when wrapped on a K3 manifold.