The Grid Stk X is an invention of the handy foam rollers. Specially equipped with the Grid surface and the Acugrip handles, they relieve and relieve minor pain and suffering. They are available in two thicknesses, regular and extra-hard "X".The world's first foam roller hand-held devices are covered with the patented, three-dimensional grid surface. They direct the nutrients directly into the tissues, thus increasing health and mobility. The practical size is perfect for the gym, the office or on the go. The patented three-dimensional surface imitates the feeling of a massage by a masseur. They are water-resistant and easy to clean.