55 Pcs 1/4''-20 Threaded Inserts for Plastic with Heat Set Tip,1/4''x8mmx8mm Heat Set Inserts Kit,Brass Inserts for 3D Pringting

The Kadrick 520Pcs M2 M3 M4 M5 Threaded Inserts Assortment Kit is a must-have for anyone doing functional 3D prints. This kit has a huge variety of heat-set threaded inserts (brass, different lengths and sizes: M2, M3, M4, M5) – plenty for all my projects without running out quickly. They install easily with a soldering iron (just heat and press in), seat flush and secure, and create rock-solid threads in PLA, PETG, ABS, etc. No more stripping plastic holes or weak screw connections – bolts thread in smoothly every time. My prints now look and feel way more professional: clean assembly, repeatable strength, and that polished, engineered vibe instead of janky self-tapping screws. Great quality brass, no defects in the batch I got, and the organizer case keeps everything sorted. If you want stronger, cleaner, and more pro-looking 3D printed parts, this assortment is perfect.

I appreciate the nice selection of sizes and overall quality of these inserts. They work fine for my applications. Install easily using the Kadrick soldering iron tips. Since my application tends to be "one and done" use where the screw is seldom, if ever, removed, I can't comment on durability. I don't see any red flags that make me think these are less durable than any others that I have used. If I have one negative comment, it is that I would like the assortment to include more sizes of M4 and perhaps fewer M3. That said, this provides plenty of selection for prototyping parts and validating design and functionality. If I find that a different length insert in the prototyping stage, that is easy to resolve when I purchase larger quantities for production runs.

Great for my hobby level 3D printed parts. Excellent assortment, all seem very well made and are highly functional. They fit my heat set kit well and I have found none that seem mal formed so far. Will buy again.

Great set of screw inserts for those who are on a budget. All inserts are machined well and screws thread very nicely into the insert. Would recommend to purchase. Set also has a nice variety of inserts as well.

Nice inserts, found some metal shavings inside one though so make sure to check before you set.

These are great I would buy them again super easy to use with a solder iron to heat press into any type of plastic.

Love this Kit, has different size fittings, wish there was a kit that also includede the screws, perfect for our little 3D printing projects

Worked great!..great selection of sizes, and the price didnt sting too bad either