These microfiber cloths are perfect for cleaning a wide range of surfaces without the need for detergents. The cloths work best dry or slightly damp and will bring out the shine on your coffee equipment and other kitchen appliances. They are really great on stainless steel or on chrome and will not leave any watermarks. The box set contains 2 grey and 2 black cloths. The two colors are helpful in assigning a particular task to color - in particular, differentiating a milk cloth from a regular counter or machine cloth.