Stead Fast Engineers Pvt. Ltd. Manufactures Mechanically Supported Copper Coil. Stead Fast Engineers Pvt. Ltd is an ISO9001:2000 certified company that also offers induction furnaces, spares for crucibles, panels and cranes. The Mechanically Supported Copper Coil is made up of heavy duty ETP grade extruded copper section. It is used in melting furnaces. The Mechanically Supported Copper Coil is designed for maximum efficiency so as to give best melt rates. It is provided with mechanical supports on the periphery and stainless steel tie rods to hold the coil.