Adaptor spindle

An adaptor spindle for transmitting rotational force from American door trim mounted on at least one end of said spindle to a European lock set engaged by said spindle, said European lock set having an inner surface with four planar channel walls defining a spindle receiving channel cross-sectionally formed with a square profile, said American door trim having an inner surface with four planar inner walls defining a spindle receiving recess cross-sectionally formed with a diamond profile, said spindle comprising two elongated members each formed with opposing end portions, one end portion of each said member being formed with eight planar faces which cross-sectionally define an eight-sided polygon profile, and said opposing end portion of each said member having four planar sides which cross-sectionally define a square profile, said members being joined with said square ends being in abutting contact, wherein each said eight-sided polygon end is formed to engage said American door trim with four of said eight planar faces engaging said inner walls of said American door trim in planar face-to-face engagement, and wherein said square ends are collectively formed to engage said European lock set with said four planar sides engaging said channel walls of said European lock set in planar face-to-face engagement, whereby the respective face-to-face engagements of said planar faces with said inner walls of said American door trim prevent rotation of said American door trim relative to said spindle, and whereby the respective face-to-face engagements of said planar faces with said channel walls of said European lock set prevent rotation of said spindle relative to said European lock set with said spindle being formed to rotate with said American door trim and transmit rotational force to said European lock set.