🔧 Elevate Your Projects with Precision Inserts! Includes a storage box for easy access and organization. Crafted from heat-resistant brass for long-lasting use. Knurled surface ensures a secure grip every time. High precision technology for flawless installation. Perfect for 3D printing, electronics, and more! 170pcs assortment Precision engineered Heat resistant brass This 170-piece assortment of M2 and M5 brass female thread inserts is designed for durability and precision. Made from heat-resistant brass, these knurled nuts are perfect for a variety of applications, including 3D printing and electronic assembly. The kit includes various sizes and comes with a convenient storage box for easy organization.