Integrated transformer gun from arm products are available for welding applications: salient features: low weight; tool gun assembly is developed for maximum flexibility during welding with minimum of stress; gun developed for ease of application during welding in high production; maintenance friendly design; transformer encapsulation material of special grade to absorb mechanical jerks during welding; two thermal cut out switches are embedded inside the transformer to protect breakdown due to abnormal rise in transformer temperature; gyro ring developed to have a easy rotation of gun in 360 direction; several throat depth and throat gap configurations as also the air cylinders comes to match a variety of jobs.