AmeriArc 2×4 auto-darkening welding lens, designed by a welder who understands the trade and how important it is to see the weld puddle with absolute clarity. When not welding, the lens transitions to ultra clear so you can prep your material and see what’s around you. Multiple shades available. General use auto-darkening filter fits most helmets. Great for experienced welder to the novice welder. Remember, your weld is your signature, invest in a quality lens!