Dutton BitsTie Chain Curb Strap4 linkBlack Tie StringsTIECHAINThis Dutton Tie Chain is used as a normal curb strap or curb chain. The uniqueness to this curb is that the nylon strings allow for the correct adjustments to ensure the curb fits your horse correctly. This is a great curb chain if you are using the same bridle on multiple horses, it will allow for quick adjustments.