This Wilton GSM30 12 in F-Clamp is an ideal tool for welding and fabrication. Made of drop forged steel, the handle provides you with a comfortable grip while working. The replaceable V-groove pad prevents damage to work pieces and enhances durability. The throat depth measures 5 1/2 in., while the jaw opening has a width of 2 in. It has a maximum jaw opening of 12 in., which means it can be used on smaller pieces as well as larger ones. This Wilton F-Clamp is the heavy duty clamp that will keep your work pieces secure during welding or fabrication.