I am a chiropractor licensed in Washington and Oregon. I have used the myometal tools on quite a few patients now and they are very satisfied with the results. I have used the tools on patients for plantar fasciitis, tendonitis, muscle tightness and muscle spasms. Patients feel discomfort while it's being performed, but I have seen tremendous results from the patients. One of my patients even started having frozen shoulder and I used the longer tool on his upper traps and back muscles and it made a noticeable difference even after the first treatment. I have used many other instrument assisted tools such as Zuka and Graston tools but these, by far, are my absolute favorite. I love the weight of the tools. Not too heavy, but also has some girth to them. There is a small tool with a hook to it for the "hard to get to" places such as around the knees, ankles and wrists and there is also a nice long bar that doesn't have a sharp edge to it so it doesn't hurt patients. Bottom line: These tools are affordable and very high quality! I'll never go back!