Extensive package content: you receive 506 pcs high‑quality metric threaded inserts plus 7 pcs heat set insert tips, offering a complete solution for plastic heat‑setting projects. Assorted sizes M2, M2.5, M3, , M5 and M6 help match different 3D printing accessories. machining for reliable fastening: clear, accurate internal threads provide smooth screw engagement and prevent stripping or slipping under load. The 45‑degree angled knurling around the body dramatically increases torque resistance and pull‑out strength. Simple to install with common tools: these brass threaded inserts can be embedded into 3D printed parts using a standard soldering iron, hot tool or ultrasonic equipment. They are also suitable for molding directly during plastic injection processes. , high‑quality brass construction: each threaded insert is made from premium brass for excellent thermal conductivity, resistance and long‑term stability. Designed to withstand temperatures above 300°C / 572°F, they remain reliable during intense plastic thermal forming and soldering work. Versatile applications in plastics and electronics: designed for most thermoplastics such as PLA, PETG, ABS, and PP, these inserts are perfect for 3D printed components, injection‑molded parts, automotive plastic covers and laptop shells., Weight: 0.661386786 pounds, Manufacturer: NONDK