- Offers more control with strong and powerful horses
- Enables precise and effective rein aids due to acting on tongue, poll, and lower jaw
- Curb chain should come into play at a maximum angle of 45 degrees to limit the poll pressure
- The leverage effect on the poll can be varied by different rein options
- Often used in combination with bit converters or with 2 reins
- Use of a curb chain guard is recommended to protect the sensitive lower jaw bone
