I have extended the following model Original 

This extension transforms the functional screw clamp into the perfect holder for securely and completely damage-free attachment of an rose arch, trellis, or poles to the garden shed, roof overhang, or other beams.

In my case, the rose arch consists of round pipes that already have a bore hole.

These can be easily attached to the clamp with a screw, and no drilling is required on the shed.

Model was printed with PETG