The rail of these WoodRiver® Q-Lever Clamps is designed for reliable gripping and holding a project with ease. The bar is made of high-quality steel. Feet allow this clamp to sit securely on the bench to free up your hands for properly clamping the project. The clamp locks with a ratchet arm that has a quick release, a type of mechanism that allows use of the whole force of the lever when gripping a blank, without slipping. The pressing jaws of the clamp have removable rubber pads that protect the surface of the blank from damage during gripping and holding. Throat depth is 3-1/4". The clamp provides 300-400 lbs. of clamping pressure.