http://www.ironmind.com/product-info/grip-strength-training-tools/captains-of-crush-grippers/index.html
ʂ̃TCgɃWv悤ƂĂ܂BXΏL̃NNbNĂ
UPLIFTōLȂő̌܂傤IKȉ{Ct܂I