3D Printer Clogged Extruder Nozzle Print Head Kit .3mm .4mm .5mm bits + Pin-Vise BIT HOLDING TOOL + (1 each) Nozzles .3mm .4mm .5mm MK7 MK8 Makerbot RepRap Felix 1.75mm filament ABS PLA

Already broke one of the 3mm and one of the 4mm drills and the tips don't fit my Qidi Tech I printer so... it's not really worth the $ for me. As I purchased this not expecting the tips to work it's okay but I was hoping for better quality drill tips... they're not sharp enough to make any progress without pressure and due to how thin they are (by design) they break under pressure really easily.

Nice drill set. I have used it a few times to clear some clogs. Works great. You just need to be very very careful not to bend the bit as it will snap right off. I broke one bit when I slipped and fumbled the drill while it was inserted into the nozzle. The fragileness is unavoidable with such small drill diameters, but by taking it slow and being careful you shouldn't have any problems with this set.

These are way too fine for me. Every time I tried to use one, it broke off inside the nozzle.

almost impossible to use without snapping the drill in the nozzle

It's a great all-around product for cleaning out your printer head but be warned if you got shaky hands you can easily break the drill tip inside the printer head dume a** me did it already.

This is a great little drill set. That said, using a drill on your nozzle runs a high risk of making the nozzle bore non-circular. That translates into uneven extrusion. I used one of these on a brass nozzle for which the clog was right inside the exit hole. That prevented the drill from entering the nozzle completely centered. The drill definitely unclogged the nozzle, but after that my prints started showing a lot of chads on vertical surfaces. After I changed the nozzle out completely, the chads went away, never to return. So be very careful with these if you decide to try them. They work better for deeper clogs. A small drill press would probably help avoid damage to the nozzle for shallow clogs, but you need to remove the nozzle to use it. The main reason for these bits is to avoid removing the nozzle (which you need to do hot, and can be a bit of a pain). But if you're going to remove the nozzle anyway, I would suggest that you just replace it; they're not very expensive.

The bits are nice, the tips work great. The tips are M6x1. The bit holder/hand drill is good quality, I use it for my other small drill bits as well.

The first time we tried to use it, it broke. So we cannot use this product at all.