The Faithfull FAIG8DT deep throat G-Clamp frame made from malleable SG iron for added strength. The deep cut Acme threads allow for smooth and fast movement. The broad swivel shoe adjusts to the correct angle to apply even pressure and the clamp has a powder coat to protect from corrosion. The Faithfull FAIG8DT G-Clamp has the following specifications Capacity 85mm (3.1/4in) Throat Depth 200mm (8in)