The Eigenstate Calibration Set produces six polarization eigenstates: linear polarized light at angles of 0, 90, +45, -45 degrees as well as circular right-handed and circular left-handed polarized light. These states are created by using a precision dichroic linear polarizer and a precision superachromatic quarter waveplate. The housings are CNC machined so that the accuracy of the angles is better than 1 arc minute. Pins on the housings mate to a v-groove and a flat groove in a quasi-kinematic fashion, while magnets provide holding force. This scheme facilitates precise, simple and fast indexing of the polarization eigenstates. Large arrows on the housing indicate the transmission axis of the polarizer and the fast axis of the waveplate for ease of use.