I bought all the tools at Paducah quilt show after watching the demo. I asked and she let me sit at the table and use the tools. I followed her step by step during the demos and it was like having a private lesson. I could do perfect 1/2 circles after one try. Rosa Rojas is the creator and she is a lovely person. I bought the complete set. The scissors are so comfortable and made to cut without strain. Her tools and method is the only way I would ever attempt to do applique for a quilt..