The Nelson Gag combines the stability of a Full Cheek Bit with the added benefit of gag action, making it an ideal choice for horses that need more control and balance. The Gag bit features cheekpieces (cords) that pass through the rings of the bit and attach to the bridle. A fixed ring at the bottom of the cord holds the rein. When the reins are pulled, the bit slides up in the horse's mouth, creating pressure behind the ears to encourage the horse to raise its head. This design is particularly useful for horses that tend to lean on the bit or are heavy on the forehand.

The Full Cheek design prevents the bit from sliding through the horse’s mouth, providing lateral stability and better guidance, especially during turns. The dual rein option allows riders to use both gag and snaffle reins, giving flexibility to adjust between more subtle control and stronger leverage.

While the gag action offers additional lift and stability, it should be noted that this bit is not recommended for inexperienced riders or horses due to its strong effect. The Nelson Gag Bit encourages responsiveness, balanced communication, and better posture for horses in need of more guidance during rides.