Psoas Release Tool & Hip Hook, Fully Adjustable Hip Flexor Release Tool for QL, Psoas, Back, Hamstring, Glute, Iliacus, and Neck Pain and Deep Tissue Relief, Gift for Women & Men (Dark Gray)Customizable Muscle Relief The attachment heads on the psoas stretcher tool can be firmly locked into the release plate for a highly customizable experience. Tailor your recovery regimen to your specific muscle groups and anatomical needs. This flexibility ensures that the tool provides an effective muscle release no matter which muscle group you are targeting. Portable and Convenient Our psoas release tools are compact, lightweight and easy to carry.