Bootstrap, AngularJS Button Group

<div class="btn-group pull-right">
        <button type="button" ng-click="env.role = 'realty_cleaning' " class="btn btn-primary grey">Горничной</button>
        <button type="button"  ng-click="env.role = 'realty_steward' " class="btn btn-primary grey">Завхозу</button>
        <button type="button"  ng-click="env.role = 'realty_handyman' " class="btn btn-primary grey">Ремонт</button>
</div>