The ornamental design for a culinary knife maintenance and sharpening steel, as shown and described.
FIG. 1 is a front perspective view of the novel culinary knife maintenance and sharpening steel;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevation view of the handle portion and the rear elevation view, the left side elevation view and the right side elevation view are all identical; and,
FIG. 4 is a bottom plan view thereof.
The steel has been shown fragmentarily to indicate indeterminate length.