FIG. 1 is a perspective view of the sheet cutting knife of the present design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a right side elevation view thereof; and,
FIG. 5 is a top plan view thereof.
The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.