1 x Faithfull Heavy-Duty G-Clamp 150mm (6in) Clamping Pressure:1400lbf The Faithfull G-Clamp is built to resist distortion, the ribbed frame is manufactured from malleable SG iron making these clamps virtually unbreakable. The spindle has acme cut threads to provide a smooth operation and maximum clamping pressure. The frames have a powder coated finish for increased resistance to corrosion making them suitable for a wide variety of metalworking and woodworking applications.