A spinal implant comprising: a first member including a wall that defines an axial cavity , wherein the first member is an outer body ; a second member extending between a first end and a second end of the second member and defining a longitudinal axis (A1), the second member being configured for disposal with the axial cavity and translation relative to the first member , wherein the second member is an inner body ; and a third member , wherein the third member is a cap including an outer surface , an inner surface , a post , and an opening , in which a moveable post is received, the outer surface being engageable with tissue and including a substantially planar surface oriented transverse to the longitudinal axis (A1), wherein the first end of the second member includes an outer surface defining a first cavity and a second cavity , the first cavity including a surface that is substantially spherical and surfaces each being transverse to the longitudinal axis (A1), and the second cavity including a surface that is substantially spherical and surfaces each being transverse to the longitudinal axis (A1); the post is disposed within the first cavity , and the moveable post includes a stem portion that is disposed within the second cavity , with the post being translatable along the spherical surface and the stem portion of the moveable post being translatable along the spherical surface ; and the disposal of the post within the first cavity and of the moveable post within the second cavity provides rotation of the third member relative to the longitudinal axis (A1) in response to the engagement of the outer surface with the tissue to allow the outer surface to adjust its angle to accommodate the specific angle of a vertebrae, thereby facilitating two distinct degrees of freedom. a first member including a wall that defines an axial cavity , wherein the first member is an outer body ; a second member extending between a first end and a second end of the second member and defining a longitudinal axis (A1), the second member being configured for disposal with the axial cavity and translation relative to the first member , wherein the second member is an inner body ; and a third member , wherein the third member is a cap including an outer surface , an inner surface , a post , and an opening , in which a moveable post is received, the outer surface being engageable with tissue and including a substantially planar surface oriented transverse to the longitudinal axis (A1), wherein the first end of the second member includes an outer surface defining a first cavity and a second cavity , the first cavity including a surface that is substantially spherical and surfaces each being transverse to the longitudinal axis (A1), and the second cavity including a surface that is substantially spherical and surfaces each being transverse to the longitudinal axis (A1); the post is disposed within the first cavity , and the moveable post includes a stem portion that is disposed within the second cavity , with the post being translatable along the spherical surface and the stem portion of the moveable post being translatable along the spherical surface ; and the disposal of the post within the first cavity and of the moveable post within the second cavity provides rotation of the third member relative to the longitudinal axis (A1) in response to the engagement of the outer surface with the tissue to allow the outer surface to adjust its angle to accommodate the specific angle of a vertebrae, thereby facilitating two distinct degrees of freedom. <EOS>