I don't know what the reports of problems with this nozzle are. I have used them by carving intricate CNC dovetails in vertical and horizontal orientations on my CNC through 4/4 milled exotic wood. I obviously need a bit that size to deal with. Now I work slowly and do 8 to 10 passes over this material, but it works beautifully. I have a third bit because I would say I need an average of about 4 dovetail boxes a week for 6 months. My first piece was rough but not broken and I still use it for rough or test cuts and my newest piece for more exotic exotics. So I can't be lucky with more bits as I've ordered more over time. The only thing that makes sense to me and from what I've seen from other reviews is that they don't understand feed, speed and depth per cut. Only if you understand that you will not have a problem
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