A challenging key pinch exercise.
The key pinch is versatile pinch variant with real-world application named for the way a key is held and used to unlock. This type of strength is equally valuable in sports as in the garage. Recall the times you tried to unscrew a nut with your fingers but couldn't get it started. That was likely a lack of strength or pain tolerance in the key pinch movement and the Coin Lift will help with both.
The coin is made from aluminum and is 1-1/2" in diameter and about 1/8" thick. Very similar to the old Eisenhower silver dollars. The sturdy cord can be attached to a loading pin or looped/snagged/clipped to anything you can imagine. (Cord material varies.)
Challenge yourself! Lifting 40 pounds with this implement is very respectable.
Consider pairing with the Barrel Strength Systems loading pin (pictured)
See the Coin Lift in action with Juji here: https://youtu.be/ssSPeUcCVYQ