US Patent 11253422 Adjustable peanut massage tool

A massage tool can include an axle including a root outer diameter, a center stop protrusion, end stop protrusions located at opposing ends of the axle, and at least one set of positioning protrusions located between the center stop protrusion and at least one of the end stop protrusions. An inner positioning protrusion of the at least one set of positioning protrusions is located axially closer to the center stop protrusion than an outer positioning protrusion of the at least one set of positioning protrusions. The outer and inner positioning protrusions each protrude from the root outer diameter of the axle a distance that is less than a distance that the center stop protrusion and the end stop protrusions protrude from the root outer diameter of the axle. Two massage elements each contain a center bore having a bore diameter substantially equal to the root outer diameter of the axle. A length of the center bore of each massage ball is substantially equal to an axial distance between the center stop protrusion and the outer positioning protrusion, and substantially equal to an axial distance between the inner positioning protrusion and a nearest one of the end stop protrusions.