Wilton 14350 4404, 4400 Series Forged C-Clamp-Extra Deep-Throat, Regular-Duty, 0-Inch-4-Inch Jaw Opening, 4-Inch Throat Depth, 2 -Pack Drop-Forged, Regular-Duty, Extra Deep-Throat The "Square-Throat" Design Of The 4400 Series Means Greater Capacity And More Versatility The Wilton 4-Inch 4400 Model Offers More Throat Depth Than Most Conventional Clamps