BESSEY IBeam Clamps All lengths of Bessey IBeam clamps provide up to 7000 lbs. of clamping force and include the following standard specifications: 2 in throat depth; 1-3/4 in jaw width; 1-3/8 in bar width; and 7/16 in bar thickness. Steel, nickel-plated IBeam design provides exceptional strength over large distances without bending or twisting. Cast iron sliding clamp jaw contains 5 clutch plates that allow it to move smoothly along the rail, while still holding its position under pressure. . Pack of 1