Step #1
Start the tutorial work by drawing rectangle & outline for the chunk shape as shown.
Step #2
Draw two parallels lines as shown & a box shape as shown.
Step #3
Make chunk shape as shown.
Step #4
Draw outline for the drill body shape as shown.
Step #5
Make on/ off trigger shape as shown.
Step #6
Draw base shape as shown.
Step #7
Draw small circles and lines at the back portion of the drill as shown.
Step #8
Enhance the back portion of the drill.
Step #9
Draw drill bit shape as shown.
Step #10
Finally, make necessary improvements to finish.