Adding an asymmetrical facet on a lathe-cut design?

[Kleka]

I am a novice making a small steel part with eMachineShop v1.64. The part is a machined pin about 6 inches in length. The 3-D rendering of the part is, so far, exactly what I want. Now I need to add facets for a crescent wrench hold so the part can be turned. The revolving profile of course can't do this. How do I get the design to shave off facets at 0 and 180 degrees for the wrench?

Thanks for any assistance.
Dan.

[Tech2]

I added a section for you at the bottom of:
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[Kleka]

Thanks, Tech2.

After considerable fiddling, the part now renders correctly. This is probably an inelegant solution, but I added two "D" shapes, air inside and -7mm, that oppose each other in the top view circle where the back sides of the D's form the parallel surfaces of the wrench hold at the end of the part. I am ready to try the proper way, if anyone can point me in the right technical direction.

Kind regards,
Dan.

[Tech2]

You would need to post your design here for further help.

[Kleka]

The question is whether the technique used to add a wrench hold is proper for machine instructions. The file should be attached.
Thanks, Dan.
A jpg of the rendering is below:

[Tech2]

It's better to draw a rectangle in a side view and set Z to a negative value.