High-end Features for Worker Safety 3M Speedglas Steel Eyes Welding Helmet 100 with Auto Darkening Filter 100V helps provide eye and face protection for worker safety while welding. The helmet comes ready to use with a lens offering three sensitivity settings: 1) Normal for most types of welding both indoors and outdoors, 2) A setting for when other welders are working nearby, and 3) A setting for low-current or stable arc welding.