Featuring the new Skull graphic design, the Speedglas 100V Skull has a powerful auto-darkening lens with shades 8-12. The Speedglas 100 welding mask features TIG Sensor Technology (TST) down to 10 amps, a new grind mode, three sensitivity settings and reliable light to dark switching. A new head harness allows for precision tightening via a ratchet mechanism, with multiple adjustment points allowing for a fully tailored fit.