These are good for throwing athletes or for building grip and training wrist extensors. Under stimulated wrist extensor will often lead to elbow problems.
You will have to go lighter than. A normal dumbbell curl. These are very simple, palms up on the way up, palms down on the way down. Keep the elbows in tight. The biggest mistake you will see is athletes letting their elbows flare out in the way down.
3-4 x 10-20 will get the job done on these.