The Wave profile is very popular. When you finger the pen in dip of the Wave, your fingers cannot easily slide. This requires less gripping pressure and helps a sore hand continue to write longer. Shaping this particular wood material this way changes the way we see the colors. That's why I put a smaller Wave under the top of the clip. Just another little extra touch for you to enjoy. That's why you can know you will always receive the best of caring with Pat's Pens and Treasures. We love you.