Excellent ways to develop a stronger & steady grip:
1) The Plate Pinch
20 secs HOLD time. 1-3 sets.
Once you are able to do that – increase the # of plates that you hold onto you reach 4 plates, then increase weights of your plate: so 2 plates of the next higher.
When To Do This : After your arm workout.
2) Farmer’s Carry/Walks
Pick up heavy dumbbells. Hold at side. GOOD posture. FIRM hold. No slipping through the fingers. You aren’t barely holding on.
Walk one way then the other for 30 secs to 2 minutes. Rest 1 min. 2 sets.
When? : AT the end of your arm/back workout.
3) Cinder Blocks.
Here, like this guy :