Compared to Mullen mouth bits the effect of single sided rein aids is slightly better with flexible mouthpieces. Pressure is also distributed over the complete tongue when pulling the reins, but get stronger towards the tongue edges.
The Flex Control is a Single jointed bit with a soft and flexible rubber covering the joint. Even pressure distribution on the tongue. Helps with contact issues in fussy horses and is good for horses who can get sore corners of the mouth as doesn’t collapse back. Encourages the horse to take a more confident contact whilst being gentle on the mouth.