IronMind Hub - A staple at grip competitions worldwide and part of the Crushed-to-Dust! Challenge, the IronMind Hub lets you build and test your pinch grip in this classic feat of grip strength. The current hub pinch grip world records are*:Men: Harri Tolonen February 4, 2017 40.90 kg (90.16 lb.) Women: Elizabeth Horne at 55.8 lb. on 5 April 2014 How do you compare? If you can do:30 lb. - average 50 lb. - accomplished 80 lb. - world-class 2-7/8" diameter gripping surface; crinkle finish.Please note you will need a Loading Pin to attach the IronMind Hub