Twisted Tap Bit

I have just model a simple twisted bit. Here I have attached the drawing file as well. In this model followed 1.Revolved Boss/Base 2.Extruded Cut 3.Revolved Cut 4.Swept Cut 5.Extruded Boss/Base 6.Flex 7.Circular Pattern 8.Fillet 9.Helix/Spiral 10.Wrap 11.Plane 12.Chamfer 13.Appearnace in Solidworks Tutorial Followed - CAD CAM Tutorials