You can also do this exercise with one arm at a time to really focus on each individual arm — 1 arm high cable curls. (all-about-arm-exercises.com)
The one arm high cable curls are a great exercise to build up the biceps while adding in a little core stability. (all-about-arm-exercises.com)
If you really want to change the shape of your biceps and create that peaked looked when you flex your arms, then high cable curls are a must. (all-about-arm-exercises.com)