Summary

The SwivelTip is designed to fit into 1/2" (18mm) EMT (U.S. metal electrical conduit). The top plate can rotate to an angle of about 40 degrees so is suitable to bear against sloped surfaces. There is a hole in the "ball" member that is designed to accept a 2.5mm steel pin (I used a finish nail) as reenforcement.

This is designed to be used in conjunction with a SpringBase https://www.thingiverse.com/thing:5921554 and TubeMate https://www.thingiverse.com/thing:5814994 to create temporary interior structures without the need for fasteners or adhesives.