This product (heat conduction kit) is only suitable for development, proofing, DIY and handicraft products when used with our electric iron. SOLDERING TIPS FOR THREAD INSERTS: The soldering tips make it even easier to retrofit thread inserts into 3D printed parts of 3D printers. PRACTICAL CHANGE SYSTEM: Due to the thread in the soldering iron adapter, the soldering tips can be changed very easily WITHOUT completely unscrewing the soldering iron. INSERTION HELP COMPATIBLE for soldering iron heads. NO DAMAGE TO 3D PRINTING PART: Due to the perfect geometry of the soldering tips, the 3D printing parts will not be . Common damage without ruthex soldering tips is, for example, damage to the surface around the thread insert. PRACTICAL THREAD INSERT SET: The soldering iron tip set includes tips for M1.4 / M1.6 / M2 / M2.5 / M3 / M4 / M5 / M6 thread inserts and a soldering iron adapter. The perfect temperature for insertion is 10-15 degrees above the hotend temperature of the 3D printing filament. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. Voltage: AC110V Colour:gold+black Material:Brass+Plastic+Metal Package Contents: 8 x Heat Insert Nut Iron Tip 1 x soldering iron