Miller Welding Helmets lead the way in auto-darkening technology and graphics .They feature multiple arc sensors, a quick-release front cover lens holder with a rubber spatter gasket and lens controls conveniently located at the bottom of the lens. Miller helmets also include Miller’s Auto-On and Grind Mode features. Auto-On eliminates accidental arc flash by automatically detecting the arc even if the helmet hasn’t been used for an extended amount of time. Grind mode allows the helmet to be used as a protective shield by preventing the lens from darkening while grinding.