Due to the lack of spare parts and the long delivery lead time of the ordered spare parts, So as the customer’s request, the roller of the iron-roughneck spinning wrench was customized for the customer. In addition to being machined according to the original design, improvements were also made by us in terms of material selection and heat treatment process. Carburizing + nitriding improved the surface hardness, and chromium plating was performed at the same time to improve anti-corrosion properties. Customer feedback the rollers are running well at offshore rig site.