The blade connectors are a sliding friction lock mechanism for attaching a pole to gauntlets. 

The Push button catch is designed to make two PVC pipes telescope out - sort of like how an umbrella shaft works. I use a metal push button catch inside the smalle pvc pipe and attach the 3D printed part to the outer one.

I am uploading this for someone specifically to use but if you are interested please DM me. 

A demo of how this works is on my instagram @hexacosplay and it is the video of the Iron Valiant costume.

Happy to share more details upon request but too complicated for me to type out here.