<h3>Key features</h3><ul><li>12.9-grade Carbon Steel, Strong and Durable: M8 nuts and bolts assortment kit is made of high-quality 12.9-grade carbon steel, with high hardness, high torque, strong stability, not easy to break or deform, durable for long time use</li></ul><p>Free shipping included. 30-day hassle-free returns.</p>