Gripping Surface: 1-1/2" wide (38 mm), 1/2" deep (13 mm). Overall Length: 6-1/2" (165 mm). Weight: 3 lbs (1.36 kg). Capacity: 3 tons (2,722 kg)Mo-Clamp's new design, the "Tight opening clamp", has all the same gripping dimension requirements as the old design. Redesigned and strengthened with our totally new screw drive mechanism. Still a full 3 ton capacity, able to reach core support and upper sheet metal areas where no other can. Perfect for small pick-up frame rails.