Very stout grip trainer. Come in resistance strong enough for someone serious about getting strong. I started off with the “trainer” I think, then graduated to the 1. Now I’m on the 1.5 which is difficult. I might be ready for the 2, but haven’t been doing them lately. I only met one other person who could close my #1.5 CoC gripper and he was just a pretty big guy, big hands. I think the 1.5 is like 164 lbs or something. Very nice. Pavel Tsatsuline sold me on them. I used the grease the groove method to progress. Worked great as a pizza delivery man
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