What does IASTM stand for? IASTM stands forInstrument Assisted Soft Tissue Mobilization. Comprised of stainless steel, these tools are the most effective manual physical therapy tools on the market. We offer two fantastic IASTM brands Hawkgrips and Myofascial Tools. These tools help break down adhesions and scar tissue from injures. Get scrapping and recover faster with IASTM tools!