@classmethod
def from_excellon(cls, line, **kwargs):
    """ Create a ZAxisInfeedRate from an excellon file line.

        Parameters
        ----------
        line : string
            Line from an Excellon file

        Returns
        -------
        z_axis_infeed_rate : ToolSelectionStmt
            ToolSelectionStmt representation of `line.`
        """
    rate = int(line[1:])
    return cls(rate, **kwargs)
