Feature: 1. Tip Specification: Provide multi specifications of brass knurled nut inserts, including M2, M2.5, M3, M4, M5, M6, M8, meet your more installation needs; Fits for 936 universal soldering iron, convenient and practical 2. Quick Replacement: Featuring female thread and knurled joint design, these soldering insertion tips can be disassembled at any time in a cooled state to replace different types of threaded insertion tips 3. Brass Material: These hot melt nut inserts are made of brass, which has strong thermal conductivity and prevents nut deflection through end contacts, making it easy for nuts to be quickly embedded into plastic parts 4. Small Insert Depth: The insertion distance of the tip is small, and it can be inserted into the interior of plastic parts to a certain depth, avoiding damage to the plastic parts after pressing, secure and practical 5. Applicable Soldering Iron: Includes 2 heating head adapters, designed specifically for Pine64, for TS1100, for TS101/936/937/900M, which can be turned into a portable heat insertion tool to expand its functionality 6. Convenient to Use: Screw installation design, easy to replace different types of soldering tips, no need to remove the entire soldering iron head, just unscrew the soldering tips and install other models 7. 3D Printer Accessories: Installing brass knurled nuts into 3D printed parts allows you to easily assemble and disassemble projects without damaging the parts, providing a smoother and cleaner insertion effect Specification: Item Type: Nut Insert Tip Kit Material: Brass Application: For TS100, TS101, PTS200 Soldering Iron Head Nut Insert Specification: M2, M2.5, M3, M4, M5, M6, M8. Package List: 1 x Soldering Adapter 8 x Replacement Tips