Suitable for ARC, TIG, MIG, Spot, Micro, Wire, AC, DC, and Plasma Welders and Plasma Cutters. Auto-Darkening Welding Helmets is designed & equipped with a special turnover up & down headband mechanism. When welder turns over the helmet to welder's head top, the headband mechanism makes helmet's gravity centre to be more lower, and be coincided with the centre of welder's head. The design of welding helmet greatly lowers the fatigue of welder's head & neck and make welder feel more comfortable than before while at working.