I wanted a pointer finger that had an adjustable length but, I wanted something more solid than the other collapsible models that I've seen.  So, I made one with a modular handle.  The extension sections can fit between the handle and the pointer finger to make it as long as needed.  The infill is set a bit high to make it a bit more solid but, the longer you make it, the more stress that will be put on the connection points.

The finger, handle and extension sections screw together end to end.  The profile has two versions of the handle, one with a hole for a keyring and one without.