How to use sketch pencils for different purpose in your drawing! What is the best pencil for you to draw and sketch? When starting the preliminary drawings for any project it is best to keep the lines light and sketchy. A 2H pencil hardness is ideal for this. So how to use sketching pencils ? As for my high school friend his work did look great, however he did take big risks using ebony and 2B pencils for his planning.