Flex Line FlexShooter Pro and FlexShooter Pro Black Edition Ballhead For medium and large sized lenses and cameras with a max load of 100 lbs. The FlexShooter Pro has a spring counter balance which will help to eliminate image creep. With a unique double ball system for simple horizon leveling, as well as an Arca Swiss mount, the FlexShooter Pro and FlexShooter Pro Black Edition are the perfect solution for even the longest lenses.