1) Compatible with M2, M2.5, M3, M5, M6 (1/4 inch), and M8 heat insert nuts 2) Compatible with standard 936 soldering iron tips (also works with FX-888D) 3) Female-threaded and sub-head design with knurled hand-tightened joint; the head can be disassembled when cooled to allow quick replacement of different threaded inserts 4) Made of brass for excellent thermal conductivity; flat contact surface prevents nut skewing and ensures precise, fast embedding into plastic parts 5) Optimized insert depth minimizes risk of damaging plastic parts during installation; allows controlled insertion into plastic components Specifications: Processing Technology: CNC turning Heating Core Thread Sizes: M2, M2.5, M3, M5, M6, M8 Material: Brass Package Includes: 1 x Heating core, 7 x Nut heads, 1 x 936 adapter Note: Color may vary slightly due to lighting and screen settings. Slight dimensional variation of ±1–3 mm may occur.