The Rolling Thunder--a universal test of grip strength that started a sport. One of the world's premier tests of grip strength, the Rolling Thunder is a training tool of first choice for everyone from armwrestlers to rock climbers and will become one of your favorites as well. Hook it up to a loading pin and clip (not included), for one-hand deadlifts, doing either reps or holds. The thick-handled one-hand deadlift is a 20th century archetypal test of grip strength and the Rolling Thunder Deadlift is now a 21st century 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: 125 lb. - average 185 lb. - accomplished 250 lb. - world-class 7-1/2" in length (rotating portion is 6" in length); 2-3/8" in diameter.