Heat Set Insert Tips for Sizes M2, M2.5, M3, M4, and M5 - Soldering Iron Tips for 3D Printer Users, 3D Printing Accessories Compatible with Hakko FX-888D and Weller SP40NKUS Soldering Irons

They work well enough and the price was fine. As always, make sure you press the fittings in nice and square and these will do a good job helping align the inserts. Nice variety of sizes helps!

Fits perfectly

These babies work really well. A whole new experience over using just my old soldering iron to set inserts. Great product.

I bought these to use with an Aipudi digital iron I purchase on Amazon. The tips fit, but there was about 1-2mm of front and back play once I secured the iron’s cover. I fixed this by cutting small slugs from a 5/32” brass rod. I then inserted the slugs inside the tips and everything works fine.***EDIT***I have have M2, M3, M4, M5 & M6 nuts. This kit includes tips to insert M2, M2.5, M3, M4 & M5 nuts. All the tips fit their intended nuts…. EXCEPT the M5!!! It’s slightly oversized and doesn’t fully seat inside the M5 nut. I can use it with the M6 nuts but it has a little bit of wiggle room. I’ve been using the M4 tip to insert M4 and M5 nut. The M4 tip fits the M5 nut with a little wiggle room as well.

Used these same day I got them, and they work great, I was using a screwdriver and Bic lighter and these babies make inserting threaded inserts a breeze!

I'm new to heat-set inserts but I have a project that needed them so I did some looking around for them. Eventually realized that they would need to fit my random Chinese soldering iron that I also purchased from Amazon here: https://www.amazon.com/gp/product/B079VVHPPSI read through the customer questions and the seller has responded to every question so that was a good sign right off the bat. But in one of the questions, the seller listed the dimensions of the insert tips so I took my digital calipers and measured my soldering iron and it seemed to fit the dimensions of the tips so I bit the bullet and bought these not knowing for sure if they'd work or not.While they do fit my soldering iron, there's about 2-5mm of play where it jiggles in and out. The hole in the tips for the heat element just barely isn't deep enough. That's not a problem with the tips of course, that's just my random Chinese soldering iron. I completed that project I had in just a few minutes with these whereas if I were to just wing it with a regular soldering tip I could've made a mess and possibly ruined my 3d printed part that took 36 hours to print and have to start over again. So I'm really glad I snagged these.Like I said I'm new to heat-set inserts so I'm no professional, but I can tell that these are the best you're gonna get as far as quality, durability, and ease of use goes with heat-set insert tips. Plus seller communication is top notch to boot so if there were any issues, I'm sure it wouldn't be too much of a hassle to work something out.If you're looking for heat-set inserts for these particular sizes and you have one of the listed soldering irons or even the one I have, I recommend you go ahead and grab them.

this product makes put in heated inserts a breeze. fits my GUSATOLAS Soldering Iron Station perfectly. the size range offered makes sure you have plenty of flexibility in your designs.

I used these to press some heat-set inserts into some wheel hubs I designed for an RC project I have been working on. In the several hubs I have pressed, I have never had issue with these tips. They work perfectly and are well worth the money to me.