The ornamental design for a housing for powertool, as shown and described.
FIG. 1 is a front perspective view of a housing for power tool in accordance with our new design;
FIG. 2 is a rear perspective view of the housing for power tool in accordance with our new design;
FIG. 3 is a front elevational view of the housing for power tool in accordance with our new design;
FIG. 4 is a rear elevational view of the housing for power tool in accordance with our new design;
FIG. 5 is a top plan view of the housing for power tool in accordance with our new design;
FIG. 6 is a bottom plan view of the housing for power tool in accordance with our new design;
FIG. 7 is a right side elevational view of the housing for power tool in accordance with our new design;
FIG. 8 is a left side elevational view of the housing for power tool in accordance with our new design; and,
FIG. 9 is a front perspective view, similar to FIG. 1 of the housing for power tool in accordance with our new design illustrating a state in which a grinder attachment is attached to the housing for power tool.
The broken line showing of environment forms no part of the claimed design.