Truly one of the best crab patterns ever designed, the Flexo and the Alphlexo have gained immense popularity over the past few years for an array of different species. Fullingmill have re-done their Flexo's to be "...equipped with properly weighted tungsten dumbbells with this variant now dressed on a Gamakatsu SL11."
These micro crabs have been deadly on the lower reaches of the Orange River for Smallmouth Yellowfish, and have even worked on the Vaal River at times.
