A bone anchor and delivery system, comprising: an anchor assembly including an expandable sheath having opposed slots (204a, 204b) formed therein and an inner lumen extending at least partially therethrough, and an expander configured to be received within the inner lumen of the sheath and rotatably advanced into the lumen of the sheath to cause the sheath to expand outward, the expander having an inner lumen extending therethrough; and a delivery tool including an outer shaft having first and second prongs (404, 406) extending distally from a distal end thereof and configured to extend along the opposed slots (204a, 204b) formed in the sheath, and an inner shaft extending through and mated to the outer shaft such that the inner shaft is prevented from axial distal translation relative to the outer shaft, wherein the inner shaft is freely rotatable relative to the outer shaft, and wherein a distal portion of the inner shaft is in the form of a drive tip that is configured to extend into the inner lumen of the expander and to apply a rotational force to the expander; wherein, when the prongs (404, 406) of the outer shaft are positioned to extend along the opposed slots (204a, 204b) in the sheath and the expander is disposed within the outer shaft proximal of the sheath, the inner shaft extends through the inner lumen in the expander and a distal end of the inner shaft abuts against a distal inner surface of the sheath such that the inner shaft can apply a force to the sheath to advance the sheath into a bone hole, and wherein rotation of the inner shaft rotates the expander coupled thereto so as to advance the expander into the sheath. an anchor assembly including an expandable sheath having opposed slots (204a, 204b) formed therein and an inner lumen extending at least partially therethrough, and an expander configured to be received within the inner lumen of the sheath and rotatably advanced into the lumen of the sheath to cause the sheath to expand outward, the expander having an inner lumen extending therethrough; and an expandable sheath having opposed slots (204a, 204b) formed therein and an inner lumen extending at least partially therethrough, and an expander configured to be received within the inner lumen of the sheath and rotatably advanced into the lumen of the sheath to cause the sheath to expand outward, the expander having an inner lumen extending therethrough; and a delivery tool including an outer shaft having first and second prongs (404, 406) extending distally from a distal end thereof and configured to extend along the opposed slots (204a, 204b) formed in the sheath, and an inner shaft extending through and mated to the outer shaft such that the inner shaft is prevented from axial distal translation relative to the outer shaft, wherein the inner shaft is freely rotatable relative to the outer shaft, and wherein a distal portion of the inner shaft is in the form of a drive tip that is configured to extend into the inner lumen of the expander and to apply a rotational force to the expander; an outer shaft having first and second prongs (404, 406) extending distally from a distal end thereof and configured to extend along the opposed slots (204a, 204b) formed in the sheath, and an inner shaft extending through and mated to the outer shaft such that the inner shaft is prevented from axial distal translation relative to the outer shaft, wherein the inner shaft is freely rotatable relative to the outer shaft, and wherein a distal portion of the inner shaft is in the form of a drive tip that is configured to extend into the inner lumen of the expander and to apply a rotational force to the expander; wherein, when the prongs (404, 406) of the outer shaft are positioned to extend along the opposed slots (204a, 204b) in the sheath and the expander is disposed within the outer shaft proximal of the sheath, the inner shaft extends through the inner lumen in the expander and a distal end of the inner shaft abuts against a distal inner surface of the sheath such that the inner shaft can apply a force to the sheath to advance the sheath into a bone hole, and wherein rotation of the inner shaft rotates the expander coupled thereto so as to advance the expander into the sheath.