*{margin:0;padding:0}
.drag-box{ position:relative;width:500px;height:5px;background:#eee; border-radius:5px;top:100px;left:50px;}
.drag{ 
position:absolute; 
background:#F96; 
top:-9px;left:0; 
padding:0; 
width:20px;height:20px;
 border-radius:50%;
    cursor: col-resize;
}