Wilton 22006 540A-8, 540A Series C-Clamp, 0-Inch-8-Inch Jaw Opening, 3-1/4-Inch Throat Depth Frames Made From High Strength Ductile Iron Castings Sliding Pin (Vise Type) Handle, Single Acme Thread Rolled Spindle And Oscillating Ball And Socket Tip Walton-Feet's Heaviest-Duty Carriage Clamp Available