4.4 #Button.button-group Button group

Toggle example guides Toggle HTML markup

.sf-button-group

Html 
    <div class="sf-button-group">
    <button class="sf-button -icon -toggle"><i class="sf-icon sf-fa sf-fa-sitemap sf-button__icon"></i></button>
    <button class="sf-button -active -icon -toggle"><i class="sf-icon sf-fa sf-fa-filter sf-button__icon"></i></button>
    <button class="sf-button -icon -toggle"><i class="sf-icon sf-fa sf-fa-cog sf-button__icon"></i></button>
    <button class="sf-button -icon -toggle"><i class="sf-icon sf-fa sf-fa-lightbulb-o sf-button__icon"></i></button>
    <button class="sf-button -icon -toggle"><i class="sf-icon sf-fa sf-fa-th-list sf-button__icon"></i></button>
    </div>