Xeltek Superpro 7500 7500N Socket Protector.
I used PLA with prusa MK3S+ default settings but you can use the filament of your choice.
Details On My Personal Blog
https://www.stevenrhine.com/?p=131304
Facebook Xeltek User Group.
https://www.rhine-labs.com/xeltek
Fits:
Xeltek 7500 Universal Programmer
https://www.xeltek.com/manual-programmers/universal-programmers/superpro-7500/
Video
The author marked this model as their own original creation.