Part 1 Aerial Screw

For my second model i decided to go with something more challenging as my first model was quite easy compared to this.

I decided to go with the Aerial screw from Da Vinci.  For my first steps i started by creating a normal cylinder which i then created another to place on top. Once both shapes were created i then used the Boolean tool to give the dent effect of the base. I then added my poles and middle section.