double helical knurled brass inserts are engineered for easy installation and performance. Suitable for use in 3D printing, woodworking, and metalworking, these inserts offer a reliable solution for creating strong, threaded connections. Heat the insert and press it into the pre-drilled hole to achieve a secure fit. Features -Color:Golden -Material:Brass -Size:0.70X0.70X0.60cm/0.28X0.28X0.24in -Improved fastening: the double diagonal design enhances the friction between the nut and the thread, ensuring secure and stable fastening -Quick installation: the embedded design allows for easy and quick installation and removal, saving time and effort -Durable copper: made from copper, these nuts offer excellent electrical conductivity and resistance to corrosion, making them suitable for various environments -Wide range of applications: specification makes these nuts ideal for securing and connecting a wide range of mechanical and electronic devices -Stable connection: using these copper nuts effectively prevents bolt loosening, providing a stable and secure connection for your equipment Package list: 60pcs brass nuts