The ornamental design for a combinedgrout saw and handle attachment for a drill, as shown and described.
FIG. 1 is a front elevational view of a combined grout saw and handle
attachment for a drill;
FIG. 2 is a left side elevational view;
FIG. 3 is a right side elevational view;
FIG. 4 is a left front perspective view; and
FIG. 5 is a left front perspective view thereof with the broken line
showing of a drill which is for environmental purposes only and forms no
part of the claimed design.