I have multiple 3D printers so this kit was a no brainer. It comes with five interchangeable 0.4mm nozzles that appear to be compatible with my CR-10 printers. Just make sure you realign them after replacing them as they probably won't exactly match what's on your printer at the moment. The brushes are fine and will come in handy for keeping the nozzles clean. The tweezers are well made and the needles for cleaning the nozzles come in handy when unclogging. All in all, anyone who owns a 3D printer should have these items in their toolbox for the price.
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