Hobart Discovery VS Variable Shade Welding Helmet - Mystic Skeleton Design, Model# 770766 9-13 variable shade with light state #4 setting offers the perfect protection while welding or grinding 2 independent arc sensors trigger the auto-darkening action with a quick 1/12,000 switch time for protection Sensitivity and delay controls let you adjust performance Adjustable ratcheting headgear provides a comfortable fit Accepts magnifying cheater lenses when needed