The process also lends itself to the automotive industry and other applications that involve robotic resistance spot welding applications. A typical automotive welding robot could conceivably be fitted with a pneumatic two-sided attachment and used in a very similar way for large scale production. The opposing forces of the two simultaneous welding tools help balance the process and eliminate the need for a bulky machine or anvil to absorb the strong axial force. The two sided FSR by extrusion joints can be made in as little as 1 s and probably faster upon optimization, which would make it feasible to implement them on an industrial line to join dissimilar parts that could not previously be joined in a cost effective or efficient way.