Rolling Thunder grepp

Not just a favorite among the world's leading strongmen and gripsters, the Rolling Thunder is a tool of first choice for everyone from armwrestlers to rock climbers. The thick-handled one-hand deadlift is a 20th century archetypal test of grip strength and the Rolling Thunder Deadlift is now a grip competition staple worldwide.
The current Rolling Thunder world records are*:
•Men: Alexey Tyukalov at 150.5 kg (331.85 lb.) on 27 July 2013
•Women: Ludmilla Gaiduchenko at 77.2 kg (170.2 lb.) on 22 September 2012
How do you compare?
If you can do: •57kg (125 lb). - average
•84kg (185 lb). - accomplished
•113kg (250 lb). - world-class
7-1/2" in length (rotating portion is 6" in length); 2-3/8" in diameter.
IronMind developed the Rolling Thunder in 1993 and since then, it's become known by strong men worldwide. Rolling Thunder competitions are often held in conjunction with major strongman events, and the Rolling Thunder is one of the Big Three grip tests of the GNC Grip Gauntlet. If you can't pull at least 250 or so on the Rolling Thunder and think you've got a world-class grip, you must be swimming in the wrong pool.