This lens has only been used about 15 times I work in a refinery and power plant and use welders with it at least 10 hours a day I know this Welding lenses out and this one is really good when it works, I have recommended it to everyone but it has cracked, this lens is really brittle. I hope they do some upgrades because I really like this lens it's so clean but cracking within 15 uses is crazy don't buy if you want a reliable lens.