The Hamco 10 Pcs 18mm x 19mm Shallow Offset Ring Spanner Set is constructed from high-quality drop-forged carbon steel, ensuring exceptional durability and strength. Each spanner features a shallow offset design, allowing easy access to fasteners in tight spaces. With a nickel chrome plating for corrosion resistance, this set is perfect for both professional mechanics and DIY enthusiasts, providing reliable performance in various applications.