For the clean Fe(110) surface Kerr angles close to 90° are observed in the frequency doubled light and for the oxygen covered surface asymmetries up to 100% . In the wavelength range from 740 to 840 nm a sizable amount of the second harmonic light is possibly generated by the bulk quadrupole like nonlinear polarization especially for p-polarized incident light. For s-polarized incident light a strong surface contribution is found.