jquery-ui-rotatable/jquery.ui.rotatable.css

jquery-ui-rotatable is a plugin for jQuery UI that works in a similar way to Draggable and Resizable.

.ui-rotatable-handle {
    height: 16px;
    width: 16px;
    cursor: pointer;
    background-image: url(rotate.png);
    background-size: 100%;
    left: 2px;
    bottom: 2px;
}