Premium Material: Made of high quality brass, durable and stable, ideal for long-term use. Stability: The spiral design ensures easy insertion, stable and not easy to deform. The holes have a very high tightening force after cooling. Practical: The spiral design ensures fast, stable insertion, Good positioning effect. Easy to Use: Insert into the hole, heat the threaded insert with a soldering iron. After heating, press the threaded insert in. Then cool down and tightenscrews. Wide Application: Suitable for used in most plastic materials like PLA, PETG, ABS, PPS, PP, etc. Features : * 100% brand new and high quality * Made of high quality material, durableand practical to use * 1 Pack of 20pcs threaded inserts. * Compared to using "fixing nuts" (you must design a slot for the nut, then put the nut into the slot and fix it while fixing the screw), these parts can produce more convenient and professional parts They can also be used in certain situations where a fixed nut cannot be used. * Insert them into a hole in the print that is slightly smaller than the insert and then use a soldering iron to melt it to melt the surrounding plastic. The insert has a slight taper and a small heat sink, the plastic will be around flowing, thus forming a very strong bond. * You don't have to adjust the design around the limitations of 3D printing (stand, print bed size, etc.), but split the parts into separate components, which are fixed with these plug-ins and machine screws. This not only gives you a bigger when designing the parts but also saves time and money by allowing you to reprint only failed components rather than complete components. * These are M3-0.5 threads, total length (OAL) 6.4mm The outer diameter at the top (wider end) is 5.6mm, and the bottom is 4.85mm The hole size in the product should be slightly smaller than the insert to allow the plastic for flowing between the cutters of the insert. Specification: * Color:As pictures show * Quantity: 20 * Overall Length (OAL): 6.4mm(Approx.) * Top Outer Diameter: 5.6mm(Approx.) * Bottom Outer Diameter: 4.85mm(Approx.) Package Contents: 20 * Heat-Set Screws Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.