the grip builds up great wrist strength and tendon strength so its not only a helper but a safty precaution also the forearms are extremely dense u need to kill them with heavy weights for few reps till u can't do it ne more and like 10-15 min. later do it again two or 3 times a day and also the grip helps keep ur hand in a good shape so u can optimize strength don't foget to work on biceps too the main muscle groups for armwrestling are, forearm, biceps, triceps, shoulders, and a little bit of chest and back pull ups help for grip, forearm, and back and pushups help triceps and plane jane curls for biceps check out http://www.eiyc.com its extremely helpful oh and when u do ur wrist curls how do u do it do u hold ur arm parallell to the ground and drop the weight down or do u hold ur arm perpendicular to the ground and pull upwards