IRWIN Record 122 Deep Throat G-Clamp 100mm (4 in) is a medium to light-duty, long reach clamp designed with a depth-of-throat approximately double that of the 120 series. Ideal for brazing, soldering and where clamping is required well in from the edge of the workpiece. Capacity: 100mm (4in).Throat Depth: 114mm (4.1/2in).