18. An anchor assembly comprising: an anchor body; an anchor head including a first arm and a second arm extending substantially parallel to one another and away from the anchor body, the first arm and the second arm separated by a gap; a shaft connected to the first arm and the second arm across the gap; a saddle having a longitudinal bore, a transverse bore which intersects the longitudinal bore, and a member capture opening; said transverse bore of said saddle being mounted about said shaft; said saddle including a peripheral wall and an end located distally from said anchor; said saddle including a member capture opening that is provided through said peripheral wall and opens to said distal end; wherein the member capture opening is adapted to receive a member, and wherein the member capture opening intersects the longitudinal bore; a set screw received by said saddle in said longitudinal bore and adapted to lock the member in said saddle; and said saddle including reinforced walls that prevent said saddle splaying when said set screw locks the member in said saddle.
18. An anchor assembly comprising: an anchor body; an anchor head including a first arm and a second arm extending substantially parallel to one another and away from the anchor body, the first arm and the second arm separated by a gap; a shaft connected to the first arm and the second arm across the gap; a saddle having a longitudinal bore, a transverse bore which intersects the longitudinal bore, and a member capture opening; said transverse bore of said saddle being mounted about said shaft; said saddle including a peripheral wall and an end located distally from said anchor; said saddle including a member capture opening that is provided through said peripheral wall and opens to said distal end; wherein the member capture opening is adapted to receive a member, and wherein the member capture opening intersects the longitudinal bore; a set screw received by said saddle in said longitudinal bore and adapted to lock the member in said saddle; and said saddle including reinforced walls that prevent said saddle splaying when said set screw locks the member in said saddle. 20. The anchor assembly of claim 18 wherein said peripheral wall is flat.