The DeWALT DXMF21011 wide view auto-darkening welding helmet lets you protect your eyes against UV and IR light without limiting your view of your work. Two DIN 5 side lenses double the viewable area giving you a wide, almost panoramic view of your work and not just a small slice of it. Three different modes allow this 1/1/1/2 lens clarity welding mask to be used in multiple roles that require different levels of protection with a DIN 4 grinding mode, DIN 5-8 cutting mode, and a DIN 9-13 welding mode. The lightning fast auto-darkening filter is connected to 4 independent arc sensors that can engage in a mere 1/15,000th of a second. The sensors can additionally be tuned to be more or less sensitive to account for varying working conditions, whether outdoors in bright light / using heavy current or in dark areas / using low current and you can even customize the lightening delay from 0.2 seconds to 1.0 second. To protect the delicate electronic filter, this helmet features both a large exterior lens and a smaller interior lens to prevent damage from slag, sparks, and more. To protect you, the entire helmet's outer shell is rated ANSI Z87+ for impact protection to keep you safe from high speed flying slag and metal debris. For lasting comfort during wear, the mask is attached to a multi-point adjustable rig with an integrated sweat band so you can stay comfortably focused without having to stop and adjust or wipe sweat from your eyes right when you hit your stride.