A cover rail corner connection for connecting rod fittings is given a construction which ensures the three dimensional unity of two fitting components extending approximately at right angle to one another during the carrying out of the impact operations at the wing or frame of a window. A double hook 21 having an approximately C-shaped cross sectional configuration at the end of the one cover rail 5 carries a projection (31) for this purpose at each of the mutually facing ends of its side flanks 27, each projection facing away from the cover rail 5 which carries it. The edge of each projection 31 facing the limit tang 28 of the double hook 21 has a spacing from the limit tank 28 which corresponds to the thickness of the other cover rail, which carries an approximately T-shaped double hook 20. The projections 31 form effective stops in opposition to the limit tang 28 which supportingly undercut the end of the cover rail 4 carrying the approximately T-shaped double hook 20 at its transverse edges 24.
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