How to Use:1. There is no need to pre-soak feet priorto using this tool. It has been developed to be used on dry skin.2. Gently pass the tool back and forth onthe area slowly apply more pressure until the callous or dry skin is removed.Caution for Use:1. Keep away from children and animals2. Do not bend or twist with great strength3. Stop using after damaged4. Wash by water after using