If you are creating a symmetrical model, it may be more efficient to create the wireframe outline of half or quarter of the model, and then mirror it.
To mirror the wireframe outline of the plate:
All of the wireframe objects are selected:
button.
A preview of the mirror is drawn on the model:
on the Views toolbar, to view the preview.
button to accept the mirroring.
button to close the toolbar.
The geometry is mirrored across the 3 planes as shown below: