What is CARNET and how does it work for fast clearance process?

CARENTS , commonly known as “Merchandise Passports”, are international customs documents that simplify customs procedures for the temporary importation of various types of goods. In the U.S., two types are issued: ATA and TECRO/AIT Carnets.We Have the Same in Kuwait Customs You just Pay Services  Fees To Move and receive your cargo again If it just for show your products out said  or for fix it and return it back  .