These new klister brushes from Swix are designed to make the application of notoriously messy klister waxes just a bit easier. Two brushes are included in the kit; a stiffer BLACK brush for use with harder klisters (KX20-KX45) and a softer RED brush for use with softer klisters (KX65-KX75). The technique is to squeeze the klister onto the base, heat with a heat gun then use the appropriate brush to evenly spread the klister along the base. Easy peasy!