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Pro Grip workouts available
On the Heavy Grips website, there are workout routines available to help you work your way up to the next gripper size.
Pro Multiple resistance levels
Available in increments of 50lbs from 100 to 300lbs.
It's two pieces of iron and a spring, which makes it extremely durable and long-lasting.
Con Not regulatable
You can not regulate the resistance on this grip strengthener. This means that if you wish to increase the resistance or have someone else use the grip strengthener, you need to get a new one with higher resistance.