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1. A graft fixation device for fixing a graft member within a bone tunnel, the device comprising:
a radially expandable sheath having proximal and distal ends and a central lumen extending therebetween, the radially expandable sheath having first, second, and third sidewalls defining a substantially triangular cross-sectional shape, the first and second sidewalls having a substantially concave outer surface configured to seat a graft member; and a sheath expander adapted to be disposed in the central lumen of the radially expandable sheath and configured to flex the three sidewalls to radially expand the sheath so as to fix the graft member within the bone tunnel; wherein the first, second, and third sidewalls are at least partially separated by three longitudinally oriented slots extending therebetween, and a proximal end of each of the slots originates adjacent to the proximal end of the sheath and a distal end of each of the slots terminates proximal to the distal end of the sheath to provide a slot free distal tip.
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