Good question. With the springs in the easiest setting, the resistance level is 45 pounds (whereas the average sporting goods store gripper is usually 30 pounds).
With the springs in the hardest setting, the resistance is 345 pounds (the Iron Mind Captains of Crush #4 gripper is listed at 365 pounds).
And since you can adjust the springs on the Ivanko Super Gripper, you have over 50 levels in between with which to train.
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