Patent ID: 8100972

Claim:
A spin-plate, comprising: a flat blade; and a shaft attached to or integral with said blade, said shaft having an axis of rotation, said shaft having a dimension perpendicular to said axis of rotation which is less than a corresponding radial dimension of said blade, at least a portion of said shaft being cylindrical, said blade disposed in a plane that is perpendicular to said axis of rotation; wherein said shaft comprises a first end and a second end and an external circumferential surface and at least a first pair of flat surfaces parallel to said axis of rotation, wherein said pair of flat surfaces are disposed on said external circumferential surface on said first end of said shaft; wherein said spin-plate is sized to fit inside a spinal cage; wherein said shaft further comprises a second pair of flat surfaces; and wherein said first pair of flat surfaces are substantially parallel to one another and define a first width therebetween and said second pair of flat surfaces are substantially parallel to one another and define a second width therebetween, wherein said first width and said second width are unequal.