largeStep

largeStep - Specifies the delta with which the slider element value changes when user uses PageUp or PageDown keys to change slider value. The largeStep default value is 2.

<input id="slider" value="30" />

<script type="text/javascript">

     $(function () {
        $("#slider").shieldSlider({
           min: 0,
           max: 100,
           step: 10,
           largeStep: 20
        });
     });

</script>