Invert body/cutout

[david.oldridge]

Sorry if this is a dumb question. I'm quite knew to CAD  and Fusion 360, but until now i have been able to learn a remarkable amount from online tutorials and resources. However, I am stuck on something I have wanted to do on several projects, but haven't been able to find any pointers - something for which I would imagine there might be a fairly simple function that I've missed..... That is how i can invert the geometry of a cutout to form a matching solid body?

I realise that in a simple example of a box with a hole in it, I can project the circumference of the hole, offset for clearance and extrude the plug.

However, in an example of say a Phillips Screw Head, with more complex 3D geometry (and for which I have a step file). How can I easily create the the equivalent of a Phillips driver bit to mate with the screw head cutout without having to rely on accurately measuring every element of the geometry and sketching it from scratch? In theory I can use different levels of projected geometry and use lofts, but I feel there is still room for minor error, and their might be a simpler method I haven't spotted..

Thanks

[davebYYPCU · Accepted solution]

Combine Cut the bolt from a plug.

Might help....

[david.oldridge]

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@davebYYPCU wrote:

Combine Cut the bolt from a plug.

Might help....

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No  "might help" about it. It very definitely helped. Thank you so much.

I had pretty much achieved the aim with sketch projections and loft, but I kinda figured there must be an almost one-click accurate solution.

And what is more it translates and inverts the convex top of the bolt head as well. Another step in my Fusion education which I wish I had reached out for previously. 

Thanks again.