Widely used iron or aluminum metal accessories for sending wires, collectively known as hardware. There are many types of hardware with various uses, such as various clamps for installing conductors, various hanging rings for insulator strings, various compression sleeves and repair sleeves for connecting conductors, various types of spacer rods on split conductors, and also various types of tension hardware for towers, as well as those related to the size used to protect conductors, which must be matched with each other.