GD Iron Grip Hand Grip Strengthener (Adjustable Hand Grips for Strength Training) Wrist and Forearm Strength Trainer

EXcellent

Great solid product. Probably the best gripper of all time. But they have the 70, 80 and 90 which leads people to believe that it's referring to build quality. But it's actually referring to the grip intensity in Ibs/kg. I don't know if they are intentionally doing this to get people to buy all 3 of them or not but this take away from the excitement of buying such a great product. They could have just put this in parentheses. This might seem small but it's extremely frustrating.