Crafted from quality materials, these threaded inserts provide excellent wear resistance for long service life. This 350-piece hot-melt threaded insert set is designed for reliable use in 3D printing projects. Package includes: 2mmxH2 20pcs 2mmxH4 20pcs 2mmxH6 20pcs 2.5mmxH2.5 30pcs 2.5mmxH4 30pcs 2.5mmxH6 30pcs M3xH4 30pcs M3xH6 30pcs M3xH8 30pcs M4xH6 25pcs M4xH8 25pcs M4xH10 25pcs M5xH8 7pcs M5xH10 7pcs M5xH12 6pcs M6xH8 5pcs M6xH10 5pcs M6xH12 5pcs These inserts are suitable for a wide range of creative projects and support different applications. Applications and use scenarios: - Reinforce 3D printed enclosures and parts that require secure mounting for hinges, brackets, or panels, enabling reliable attachment without stripping. - Build durable, serviceable joints in 3D printed robotics, RC projects, or hobby builds where motors, plates, or sensors need repeated assembly. - Repair or upgrade worn threads in plastic components by installing metal threaded inserts, extending the life of parts that are repeatedly assembled and disassembled.