Graft fixation device and method of using

A graft fixation device, comprising:

• A. an annular collar disposed about and extending along a central axis, said collar having a first end, a second end, an interior lateral surface, and an exterior lateral surface, said interior lateral surface being threaded about and along said central axis, said collar further having at said first end collar driver means for receiving an external driver rotatable about said central axis,
• B. a first annular drive element disposed concentrically within said collar and having a first end closest to said first end of said collar and a second end opposite thereto, and further having:
• i. an outer lateral surface in threaded engagement with said threaded interior surface of said collar,
• ii. an inner lateral surface disposed about said central axis,
• iii. first driver means at said first end of said drive element for receiving an external driver rotatable about said central axis,
• C. a second annular drive element disposed concentrically within said collar and having a first end closest to said second end of said collar and a second end opposite thereto, and further having:
• i. an outer lateral surface in threaded engagement with said threaded interior surface of said collar,
• ii. an inner lateral surface disposed about said central axis, and
• D. tissue securing means disposed concentrically within said collar between said first and second drive elements for releasably securing at least a portion of said graft.