Threaded Inserts for Plastic, M2 M2.5 M3 M4 M5 M6 Assortment Box (345 Pieces) Heat Set Insert for 3D Printing Components and Plastic Parts - Brass Metric Knurled Nuts

Does what I need it too when I custom make things on my 3d printer and need two parts connected great quality and good value for money !

Bought these to get a selection of threaded inserts without having to by a number of bags Really pleased with the quality and hold once installed Good box for storage

Very good product, I get through a fair few of these in my 3d prints, these are as good as any others, they set in well and stay in well, the threads are nice and clean and accept the m3 bolts easily.

I've found myself buying this brand in particular. They are good quality. I have bought large quantities from CNC Kitchen, but sometimes I've needed sizes I didn't have, in a hurry, so I end up in here - choose these every time. I don't put them in hot as I don't personally think that's a good idea. I fit mine using a toggle press and add they go in, you can see them rotating and effectively cutting themselves into the material. A royal pita to get out of something is wrong, so I know they work!

Work well enough, does what they say it does well.

A little bit of practice is useful to start with, making different-sized holes to see what works best for you, and to get a good temperature and technique for inserting. After that, these are very effective at holding screws to join printed parts together.

Great for 3D prints!

Perfect