🔧 Elevate Your 3D Printing Game with Glarks! Comes in a neatly packed plastic box for easy storage and accessibility. Includes 15 types of M2, M3, M4, M5 inserts for all your 3D printing needs. Perfect for injection molding, ensuring a tight and secure fit every time. Designed with a conduction valve for quick and easy setup—no back-drilling required! Crafted from high-quality brass for unmatched strength and longevity. 370 pcs Premium brass Easy install The Glarks 370Pcs M2 M3 M4 M5 Female Thread Knurled Brass Threaded Insert Embedment Nut Assortment Kit is a comprehensive collection of high-quality brass inserts designed for 3D printing and injection molding applications. With 370 pieces across 15 sizes, this kit ensures you have the right fit for any project, all while being easy to install and durable for long-term use.