This is a single piece version of dougc314's helping hands design. It has 1/2 inch tapered pipe threads, so you don't have to glue it to the pipe. Assembly is similar to the original design except with 1/2 inch pipe.

This is compatible with either the original ball and socket joints or my modified version:
https://www.thingiverse.com/thing:5578
https://www.thingiverse.com/thing:2539262