The ornamental design for a powertoolextension handle apparatus, as shown and described.
FIG. 1 is an exploded perspective view of a power tool extension handle apparatus showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in the drawings illustrate portions of the power tool extension handle apparatus that form no part of the claimed design. Specifically, the broken line showing of a strap, a buckle with pivot bolt and screw, and a curved pad in FIG. 1 represent environment and so for clarity are not shown in related FIGS. 2-7. All other broken lines in FIGS. 1-7 represent unclaimed portions of the article.