Every muscle in your body is useful, otherwise it wouldn't be there in a first place. The most minuscule movements require the contraction of many muscles and nerves. Simply because you don't see any "use" in biceps, does not mean that you can rule them out of your work out routine. Besides, muscle imbalances can cause injuries. Treat each muscle with equal attention.
[K]Blade Tour, SP Swing
Signum Pro Hyperion Blackline 1.30 mains + Gamma TNT2 1.30 crosses @ 54lbs