This is just a basic clip to clip your ski poles together. Should work with most ski poles about 18mm in diameter. The gap between the poles when clipped is about 15mm, so if you have bigger or wider grips on the poles, it may not work for you.
The version in the photos has my name printed into it (which I obfuscated for the photos), but the STL file here is just blank without any text.
Ski_Pole_Clip_V2_-_Blank.stl | 534.3KB |