![Hex DB Claw Curls](https://www.elitefts.com/wp/wp-content/uploads/2010/05/ExerciseIndex2.jpg)
This is a great way to incorporate grip work into your bicep curls.
It works best with hex dumbbells. Place two hex dumbbells together and grab the handles as shown. Be sure to constantly squeeze with all your fingers and thumb. Proceed to do regular bicep curls (or any exercise of choice).