Bootstrap 3 Table column same width

I am trying to get the same width to all columns, Is there a proper way for Bootstrap?

                <a href="produkte.html">
                    <div class="panel-body">
                        <table class="table">
                            <tbody>
                            <tr>
                                <th></th>
                                <th>#</th>
                                <th> # analog Eingänge</th>
                                <th> # I/Os</th>
                            </tr>
                            </tbody>
                        </table>
                    </div>
                </a>