Reinforce and repair threads with our 50-piece set of 302 Stainless Steel Self-Tapping Thread Inserts! A self-tapping insert is a type of thread-reinforcing fastener designed to create a highly strong internal thread when embedded in soft materials like plastic or copper. It's also ideal for repairing damaged internal threads. Features: 1. Crafted from high-quality stainless steel, ensuring high hardness and low abrasion. 2. Significantly enhances the strength and stability of screw connections. 3. Offers elasticity and even load distribution, providing vibration resistance to prevent loosening. 4. Long service life – designed for repeated use. 5. Quick and easy to install with just one mounting tool. 6. Can also repair damaged threads by installing it into the existing thread hole. Specification: Material: Stainless Steel Quantity: 50 pcs Color: Silver Package weight: approx. 192g / 6.8oz Packing list: 10x M3*0.5-M5*0.5 L6 10x M4*0.7-M6.5*0.75 L8 10x M5*0.8-M8*1.0 L10 5x M6*1.0-M10*1.5L12 5xM8*1.25-M12*1.5L15 5xM10*1.5-M14*1.5L18 5xM12*1.75-M16*1.5L22 1 x Storage Bag Note: Due to differences between monitors and light effects, the pictures may not reflect the actual color of the item.