Product name: T12 Hot Melt Nut Indenter Kit Product scope of application: This product features soldering iron tips compatible with T12 soldering irons and is interchangeable with standard 936 universal soldering iron tips. It is designed for use with M2 (common to M2.5), M3, M4, M5, M6 (1/4 inch), M8, and similar hot-melt nuts or inserts. Commonly used for installing copper nuts with 3D printers or embedding nuts into plastic materials. Processing technology and color: CNC precision turning Color: As shown Material: Stainless steel + copper Package Contents: 1 x Heat Insert Nut Iron Tip Kit Note: The package includes only the items listed above. Other products are not included. Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.