Urrea deep throat forged body c-clamp, 412, 0-12″ opening, 5-3/4″ throat depth, 9300 lb capacity heavy-duty c-clamps are forged in high-quality alloy steel. Their highly engineered proportions perform better on resistance tests. Screws with acme rolling threads provide more strength and smooth operation. These heavy-duty c-clamps allow greater precision, better performance and high efficiency. They feature a large diameter screw, a comfortable sliding t-handle and acme thread that makes turning easy. Design provides greater reach and throat depth. These deep-throated forged body c-clamps are ideal for safely fastening pieces so you can work on them. Mainly used for welding and soldering, in workshops or for industrial purposes.