The Welding Clamp, manufactured by Strong Hand Tools, can handle clamping pressure ranging from 1,000 LBS up to 1,200 LBS or 460 kg up to 544 kg. The throat depth measures 4-3/4" or 120 mm while the tapped hole is in the 3/8-16 M10 size. The pivoting contact plate has a 3/8-16 threaded hole.