IRWIN Record heavy-duty drop-forged engineers steel clamp ideally suited to engineering applications. Particularly suitable for fabrication and welding. High-quality steel screw with drop handles.IRWIN Record 121 Extra Heavy-Duty Forged G-Clamp 250mm (10 in).Size: 250mm (10 in).Throat depth: 102mm (4 in).Additional Information:• Clamp Type: Heavy-Duty• Capacity (mm): 250• Size (in): 10