Wilton 22005 540A-6, 540A Series C-Clamp, 0-Inch-6-Inch Jaw Opening, 2-3/4-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