Patent ID: 7096766

Claim:
A sleeve device comprising: a sleeve portion; the sleeve portion having a first opening; a first sleeve extending from an upper side of the sleeve portion; the first sleeve having four sides; two opposite sides of the four being suitable for one kind of spanner and a second pair of said four sides being suitable for another kind of spanner; wherein said two opposite sides of the first sleeve are smaller than that of the sleeve portion and said second pair of said four side is equal to an outer circumference of the sleeve portion; and a second sleeve extending from an upper side of the first sleeve; the second sleeve having four sides; two opposite sides of the four sides being suitable for one kind of spanner and the other two opposite sides being suitable for another kind of spanner; the first sleeve and the second sleeve being formed as a stepped structure; the second sleeve having a second opening; wherein the four sides of the second sleeve is smaller than that of the first sleeve.