Self-clamping, one-hand traditional Stillson wrench for ease of use.Body made of traditional forged steel, anti-corrosion treated.Long-lasting serrated induction hardened jaws.Spring-loaded for ratchet-like use.Anti-corrosion treated body.Comfortable-to-use traditional metal-bodied wrench.Standards: US Norm GGG-W-651, Type I Class B, UNE 16554