EBIC Oilfield Equipment may act according to the user the request to product Kelly and hexagonal Kelly, the length usually is 12.19 meters, uses AISI 4145H alloy structure steel manufacturing, and carries on the quenching and tempering treatment in the full length scope. The technique of production and technical standard are completely in accordance with API, after heat treatment, apart from surface inch under to sampling under the room temperature to test its Brinell hardness to be possible to achieve real.