1、Soreness Relief: Hip flexor massager can correct soreness and dysfunction in the hip area, giving you the pressure you want at any time, only pressure can release the body muscle tissue. 2、Adjustable Design: Attachment head of psoas massager locks into the release board, allowing you to select one of 5 positions on each side, easy to adjust. 3、Precise Target Depth: Psoas muscle release tool is designed to provide the deepest relief for people of any age and body type. Precise target depth for specific and hard to reach muscles. 4、Massager Set: Small massager can be used for feet, shoulders, back, legs. Large massager is applicable for hamstrings, thighs, inner thighs, calves, lower back, upper back, triceps, biceps, chest. 5、Portable Design: Light weight and in small size, easy to store and carry, can be easily put into your bag, suitable for gym, sports training, office or home. 6、ABS Material: Hip flexor release tool adopts ABS material, safe and eco friendly, firm and sturdy, no deformation, stable and durable for use. Item Type: Psoas Muscle Release Tool Material: ABS Applicable Parts: L: Hamstrings, thighs, inner thighs, calves, lower back, upper back, triceps, biceps, chest. S: Feet, shoulders, back, legs Effect: The psoas muscle complex (hip flexors) is considered a key part of our body. The psoas major massager regulates our fight or flight response, regulates our breathing, and helps pump blood and lymph through our body Product Size: L: Approx. 41.5 x 14 x 12.5cm / 16.3 x 5.5 x 4.9in S: Approx. 8.5 x 4.5 x 4cm / 3.3 x 1.8 x 1.6in 1 x Adjustable Massager 1 x Mini Massager