Review on 3M Speedglas 9100 Hard Hat Adapter: Enhance Welding Safety with this Welding Helmet Accessory (Hard Hat not included) by Mike Devine

Does not fit my 9100fx. One of the pivot bolts on my helmet has a square ridge, this mount has a rounded ridge. It won't hook into the mounts on the hood so it won't snap or latch properly. The brackets don't quite fit either. It sucks that I order what this listing says should be straight seating and it's not. I want you to know FX.