27-year old Jang Sung-hyun has been certified on the Captains of Crush No. 3 gripper, the world standard of superior grip strength.

He read about Captains of Crush (CoC) grippers on the internet, Jang Sung-hyun told IronMind, and began training on them in December 2006, when he bought a CoC No. 1 gripper—which he said he could close for five reps.

“December 2012 was the first time I fully closed Captains of Crush No. 3 with a CCS [credit card set], and I was thinking certification, but a few months later, I injured my right hand from excessive training. Before my injury, I trained two or three times a week and after the injury, I couldn't train for more than a year. Recently I train once a week.


“I had to rehab my right hand for more than a year. Recently I could CCS close the CoC No. 3 again. With my off hand, I can close the Captains of Crush No. 3 with a parallel set.

“I can bend a 6" grade 8 bolt and want to certify on the IronMind Red Nail someday,” Jang Sung-hyun told IronMind.

Congratulations, Jang Sung-hyun, your name has been added to the official certification list for the Captains of Crush No. 3 gripper.





IronMind extends its special thanks to Koo Hyoungtae for serving as the referee on Jang Sung-hyun’s official attempt. IronMind® | Photo courtesy of Koo Hyoungtae

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