DIY Pinch grip trainer variations

Variation on Pinch grip trainer.

Variation on grip trainer with eye bolt. 

My pinch grip trainer is evolving. My original required me to re-tie the weights. 

Both of these utilize a thing I bought at Wal-mart, a forearm developer to carry the weights. 

The problem I've found out with the forearm developer, the weight carry portion has a large nut at the bottom which creates indents in the rubber mat. So far I enjoy the device though.