A suture system includes a tool and a suture assembly. The tool includes a head having a proximal portion housing a needle and a distal end spaced apart from the proximal portion by a throat. The needle is movable through a needle exit port formed in the proximal portion of the head to a cavity formed in the distal end of the head. The suture assembly includes a length of suture connected to a tubular leader. The tubular leader includes an annular wall extending between an interior surface and an exterior surface, and a clasp having a first portion disposed between the interior surface and the exterior surface of the annular wall and a second portion extending out of the annular wall and adapted to secure the suture against the annular wall.