All-steel, drop forged (CF45 Steel). With extra large anvil and higher jaws for an increased clamping volume. Jaws and anvil induction hardened (HRC 52-58). Rolled twin start Acme thread for precise operation. Adjustable jaw alignment system guarantees precision clamping. Parallel vice with 2 welded jaws for clamping pipes guarantees precision parallel clamping. Available with jaw widths from 100 mm to 180 mm. (Other technical details like Parallel-Vice). LONG TIME GUARANTEE