390PCS 90W Soldering Iron Heat Set Inserts Tool with M2-M8 Threaded Inserts — Open-Box, 12% Off

COMPLETE 390-PIECE KIT: Includes 1 digital 90W soldering iron, 380 brass heat-set inserts, 7 installation tips, 1 threaded adapter, 1 angled tweezer and operating instructions. A complete solution for adding durable metal threads to 3D-printed and molded plastic parts. 380 INSERTS IN 8 SIZES: The assortment includes 60 M2, 100 M2.5, 100 M3, 50 M4, 40 M5, 10 M6, 10 M8 and 10 1/4-20 brass threaded inserts. Multiple sizes make it easy to work on enclosures, fixtures, prototypes, replacement parts and other DIY projects. FAST AND CONTROLLED HEATING: The 90W ceramic heating core heats quickly and provides responsive temperature control. The digital LED display, plus and minus buttons, °C/°F switching and automatic sleep function make it easier to adjust the iron for different insert sizes and plastic materials. STRAIGHTER, CLEANER INSTALLATION: Seven flat-ended heat-set tips transfer heat directly to the brass insert and help keep it aligned while pressing it into the pilot hole. The threaded quick-change design allows you to switch between M2, M2.5, M3, M4, M5, M6 and M8 tips. FOR 3D PRINTING AND PLASTIC REPAIRS: The brass inserts feature knurled outer surfaces that grip the surrounding plastic after cooling, creating durable internal threads for repeated assembly. Suitable for compatible thermoplastic enclosures, jigs, fixtures, electronics housings, models and hobby projects.

Add durable metal threads to your 3D-printed and molded plastic parts with the QLOUNI 390-Piece Heat Set Insert Tool Kit.

This complete kit combines a 90W digital soldering iron with 380 brass heat-set inserts in eight commonly used sizes. The ceramic heating core delivers quick, responsive heating, while the digital display and temperature adjustment buttons make it easier to select an appropriate setting for different plastic materials and insert sizes.

Seven purpose-built installation tips are included for M2, M2.5, M3, M4, M5, M6 and M8 inserts. Their flat contact surfaces transfer heat directly to the insert and help guide it vertically into the pilot hole. The threaded adapter allows convenient tip changes, while the angled tweezers help position smaller inserts before installation.

The 380-piece insert assortment includes:

• 60 x M2 inserts
• 100 x M2.5 inserts
• 100 x M3 inserts
• 50 x M4 inserts
• 40 x M5 inserts
• 10 x M6 inserts
• 10 x M8 inserts
• 10 x 1/4-20 inserts

To install, select the matching tip and insert, adjust the temperature for the plastic material, position the insert over the pilot hole and press downward slowly. Stop when the insert is level with the plastic surface, then allow it to cool completely before installing a screw.

The kit is suitable for 3D-printed enclosures, prototypes, fixtures, brackets, electronics housings, replacement parts and other compatible thermoplastic projects. For best results, test the temperature and installation time on a spare piece of material before working on the finished part.

Package Includes:

1 x 90W digital soldering iron

380 x brass heat-set inserts

7 x heat-set installation tips

1 x threaded soldering iron adapter

1 x angled tweezer

1 x operating instruction