Modern welding helmets use auto-darkening filters to protect your eyes, as well as offering a much larger viewing area compared to older flip-down style helmets. Some welding helmets feature external grind buttons so you can switch easily between welding and grinding without taking your helmet off, while others come equipped with extra features like large viewing windows or control... Modern welding helmets use auto-darkening filters to protect your eyes, as well as offering a much larger viewing area compared to older flip-down style helmets. Some welding helmets feature external grind buttons so you can switch easily between welding