The Hamco 5 Pcs 21mm x 23mm Shallow Offset Ring Spanner Set is expertly crafted from drop-forged carbon steel, ensuring exceptional durability and strength. Each spanner features a shallow offset design for easy access to fasteners in tight spaces. With a nickel chrome plating for enhanced corrosion resistance, this set is ideal for both professional mechanics and DIY enthusiasts, providing reliable performance in various applications.