IRWIN Tools VISE-GRIP Pliers, Iron Worker's, 9-Inch (2078909) Constructed from durable nickel chromium steel. Machined jaws for maximum gripping strength. The handle is made from soft material to allow a more comfortable grip. Machined jaws provide maximum gripping strength. Induction hardened cutting edge stays sharp longer. Cross-hatched teeth are designed to provide an aggressive grip.