Bolt-on jaws and anvil face for heavy duty metal work. Manufactured from strong, ductile cast iron and shaped to increase grip on pipe or bar up to approximately 160mm (6-5/16″) in diameter. Compatible with SuperJaws XXL (SJA100XL). Bolt-on jaws and anvil face for heavy duty metal work. Manufactured from strong, ductile cast iron and shaped to increase grip on pipe or bar up to approximately 160mm (6-5/16″) in diameter. Compatible with SuperJaws XXL (SJA100XL).