Help! I need to inverse this lock

[Anonymous]

I'm trying to make a another piece that inverted to the one I made, so I can lock them together, could someone help? 

[davebYYPCU]

Your question is not real clear, 

Is this what you mean?

I have selected both bodies and use the Mirror Command, with the bottom face to get that result, 

I have redone the object, as I would do it,

use the file origin, 

will leave you to dimension the sketches,

sketches are unfinished until all articles have turned black.

Might help....

[Anonymous]

Thanks for responding

Sorry, Im having a hard time explaining it, but what I'm trying to do is make the two shapes snap together so I need to design a "male" and "female" piece. I can make the "male" end but not the "female" one.

[davebYYPCU]

Closer?

Outside one will hold down the inside....

[Anonymous]

I'm trying to make a "female" version of this circle so the can lock in place, I've attached to different file to help illustrate what I mean.2