Ball Set Screw (Roller Ball Grub Screw) Example Joint

I commented on this Youtube video (https://youtu.be/lcI8Kw39ADk?si=V1Sab3AD5HP00Tb5) about using this type of hardware for a joint like this. The familiar indexing “click” sound is found in many different products. This is just one way to index a joint like this.

It uses small bearings, a 3M bolt and locknut, and 2 M4x6 Ball Set Screws (https://www.amazon.com/dp/B07R5Z8Z3B?ref_=ppx_hzod_title_dt_b_fed_asin_title_0_0&th=1)