I was introduced to this tool about a year ago when I was looking for something to help with my wet and nuno felting projects. The palm washboard eliminates hours of rolling during the wet felting process and helps simplify the fulling stage. It makes nuno felting a much easier process. At my suggestion, the designers, Robbin & Harry Firth of Heartfelt Silks, developed a rounded tool to work on the inside of vessels. I am able to create vessels, scarves & other felting projects in less time & with less effort. I have found no other tools that work as well as the Palm Washboards.