Step Stool

FIG. 1 is a front, left, top perspective view of a step stool, showing my new design;

FIG. 2 is a rear, right, bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a partial enlarged view of the portion marked “ 9 ” of FIG. 1 .

The broken lines depict portions of the step stool that form no part of the claimed design.

The dot dash dot broken lines in FIGS. 1 and 9 depict the boundary of the enlargements and form no part of the claimed design.