Wilton 22008 540A-12, 540A Series C-Clamp, 0-Inch-12-Inch Jaw Opening, 3-5/8-Inch Throat Depth Cast Iron 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