The water pump box joint pliers are constructed from premium chrome vanadium steel, ensuring high-quality material. They undergo a drop-forged process, making them entirely hardened and tempered for maximum durability. The working surfaces are induction hardened, enhancing their overall strength. The surface finish is a red lacquer, providing both visual appeal and protection. These pliers are made according to the standard ISO 8976, ensuring they meet industry specifications for reliable and efficient use.