thanx, I'll check'em out. :cheers::flag:They are great lights made by Malkoff Devices. Check out Malkoff's website and then see how many fanboys there are that back the product on CPFs. I have a 2D Maglite drop-in and the thing is awesome. If you want to save a few $$ and you already have a Surefire, buy one of Malkoff's drop-ins for that. The Elzetta is a Surefire style lego light and the parts are interchangeable, and more expensive.