An anchor delivery system for repairing a heart valve, comprising: a delivery catheter suitable to be advanced into a patient's heart via intravascular access; an anchor delivery mechanism disposed at a distal end of the delivery catheter, the anchor delivery mechanism including: a first pincer arm (515a, 515a', 515a") having a distal end (535a, 535a', 535a") and a proximal end rotatably coupled to a distal end of the anchor delivery mechanism at a first connection point; a second pincer arm (515b, 515b', 515b") having a distal end (535b, 535b', 535b") and a proximal end rotatably coupled to the distal end of the anchor delivery mechanism at a second connection point opposite the first connection point; wherein, in a closed position, the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are positioned toward a center of the anchor delivery mechanism; and wherein, in an open position, the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are rotated apart from each other, wherein the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are configured to pierce a tissue of the heart valve, wherein an expandable anchor (300, 400a-400h) is deliverable through the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") when the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are in the closed position. a delivery catheter suitable to be advanced into a patient's heart via intravascular access; an anchor delivery mechanism disposed at a distal end of the delivery catheter, the anchor delivery mechanism including: a first pincer arm (515a, 515a', 515a") having a distal end (535a, 535a', 535a") and a proximal end rotatably coupled to a distal end of the anchor delivery mechanism at a first connection point; a second pincer arm (515b, 515b', 515b") having a distal end (535b, 535b', 535b") and a proximal end rotatably coupled to the distal end of the anchor delivery mechanism at a second connection point opposite the first connection point; wherein, in a closed position, the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are positioned toward a center of the anchor delivery mechanism; and wherein, in an open position, the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are rotated apart from each other, wherein the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are configured to pierce a tissue of the heart valve, wherein an expandable anchor (300, 400a-400h) is deliverable through the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") when the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are in the closed position. a first pincer arm (515a, 515a', 515a") having a distal end (535a, 535a', 535a") and a proximal end rotatably coupled to a distal end of the anchor delivery mechanism at a first connection point; a second pincer arm (515b, 515b', 515b") having a distal end (535b, 535b', 535b") and a proximal end rotatably coupled to the distal end of the anchor delivery mechanism at a second connection point opposite the first connection point; wherein, in a closed position, the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are positioned toward a center of the anchor delivery mechanism; and wherein, in an open position, the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are rotated apart from each other, wherein the distal ends (535a, 535a', 535a"; 535b, 535b', 535b") of the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are configured to pierce a tissue of the heart valve, wherein an expandable anchor (300, 400a-400h) is deliverable through the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") when the first and second pincer arms (515a, 515a', 515a"; 515b, 515b', 515b") are in the closed position.