EN 379. Blaze Welding Shield. Designed specifically for the occasional welder who still values excellent protection, the light weight, user-friendly Speedglas 100 shield is ideal for those who need to weld occasionally such as plumbers, construction workers and the auto-trade. Auto-darkening filter that provides uniform shading across the entire viewing area The shields have five user-selectable dark shades from shades 8 to 12 Three sensitivity settings Lightweight Versatile headband, designed to be adjusted with one hand