The Hamco 5 Pcs 20mm x 22mm Shallow Offset Ring Spanner Set is made from high-quality drop-forged carbon steel, ensuring exceptional durability and strength. Each spanner features a shallow offset design, allowing for easy access to fasteners in tight spaces. With a nickel chrome plating for corrosion resistance, this set is ideal for both professional mechanics and DIY enthusiasts, providing reliable performance in various applications.