The Zildjian RKWD wooden tip sticks have added length and a fat tip for maximum power, weight and durability. The DIP material is a special coating that is applied to the grip area of the stick to provide a comfortable, slightly tacky gripping surface. This allows drummers to loosen their grip and relax their hands more, particularly in sweaty playing situations. The DIP coating also offers the drummer or percussionist an alternative striking surface.