probably cost them $1 to produce. just 3d printed plastic. looks super cheap. they do stay on the paddle so I guess it gets the job done but they're very overpriced. I worry they might damage the paddle edge with how much pressure is required. wish I had gotten adjustable metal ones.

Easy & Stays on the Paddle despite hard hits

This is very useful to try which part of the paddle you need weights on.. I am very impressed with it. My initial order some of the clips became loose after 6 months, but PickleClips immediately replaced them with clips made out a new material when I emailed them about it. Nice Customer service.