An anchor inserter tool (300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400) for use in attaching tissue to bone, comprising: a first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410) having first and second prongs (324a, 324b, 1324a, 1324b, 1374a, 1374b) extending distally from a distal end thereof and configured to extend along opposed slots formed in a sheath of an anchor assembly, wherein the sheath of the anchor assembly is configured to receive an expander to expand the sheath and thereby anchor it to bone; a second elongate body (310, 410, 510, 606, 706, 806, 906, 1006, 1110, 1206, 1306, 1406) slidably disposed relative to the first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410); and a handle assembly (302, 402, 502, 602, 702, 802, 902, 1002, 1102, 1202) coupled to a proximal end of the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410), the handle assembly (302, 402, 502, 602, 702, 802, 902, 1002, 1102, 1202) including a locking mechanism (314, 414, 514, 614, 714, 814) that is movable between a locked position, in which the locking mechanism (314, 414, 514, 614, 714, 814) prevents movement of the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410) relative to one another, and an unlocked position in which the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410) are axially slidable relative to one another, wherein the handle assembly (302, 402, 502, 602, 702, 802, 902, 1002, 1102, 1202) includes an actuator (304, 404, 504, 604, 704, 804, 904, 1004, 1104, 1204) coupled to the first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410) and configured to cause axial translation of the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410) relative to one another, thereby permitting the first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410) to retract relative to the second elongate body (310, 410, 510, 606, 706, 806, 906, 1006, 1110, 1206, 1306, 1406) without rotating an anchor assembly with which the prongs (324a, 324b, 1324a, 1324b, 1374a, 1374b) are engaged. a first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410) having first and second prongs (324a, 324b, 1324a, 1324b, 1374a, 1374b) extending distally from a distal end thereof and configured to extend along opposed slots formed in a sheath of an anchor assembly, wherein the sheath of the anchor assembly is configured to receive an expander to expand the sheath and thereby anchor it to bone; a second elongate body (310, 410, 510, 606, 706, 806, 906, 1006, 1110, 1206, 1306, 1406) slidably disposed relative to the first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410); and a handle assembly (302, 402, 502, 602, 702, 802, 902, 1002, 1102, 1202) coupled to a proximal end of the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410), the handle assembly (302, 402, 502, 602, 702, 802, 902, 1002, 1102, 1202) including a locking mechanism (314, 414, 514, 614, 714, 814) that is movable between a locked position, in which the locking mechanism (314, 414, 514, 614, 714, 814) prevents movement of the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410) relative to one another, and an unlocked position in which the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410) are axially slidable relative to one another, wherein the handle assembly (302, 402, 502, 602, 702, 802, 902, 1002, 1102, 1202) includes an actuator (304, 404, 504, 604, 704, 804, 904, 1004, 1104, 1204) coupled to the first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410) and configured to cause axial translation of the first and second elongate bodies (306, 310, 406, 410, 506, 510, 606, 610, 706, 710, 806, 810, 906, 910, 1006, 1010, 1106, 1110, 1206, 1210, 1306, 1310, 1406, 1410) relative to one another, thereby permitting the first elongate body (306, 406, 506, 610, 710, 810, 910, 1010, 1106, 1210, 1310, 1410) to retract relative to the second elongate body (310, 410, 510, 606, 706, 806, 906, 1006, 1110, 1206, 1306, 1406) without rotating an anchor assembly with which the prongs (324a, 324b, 1324a, 1324b, 1374a, 1374b) are engaged.