Review on 🔩 Hilitchi 250-Pcs Brass Knurled Threaded Insert Embedment Nuts Assortment Kit - M2/M3/M4 Female Thread by Micael Rau

A very useful sample set of threaded inserts in different sizes. They use small ribs on the outside - they seem to work better than the knurled ribs I've used before. There's a good range of sizes (both diameter and depth) and a decent amount of each size - enough for prototype testing. The insert size is accurate - the countersunk hole size matches the specified insert dimensions and they fit snugly and accurately with a soldering iron. I've used them in PLA and PETG with no problems - very satisfied.