Designed to meet the demanding needs of industrial workloads. The IBeam is very stiff - resists bending or twisting like other clamps over a long distance. These clamps are best for powerful clamping where strength and straightness over a distance are crucial to hold wood in alignment. BESSEY IBeam clamps are ideal for high-demand industrial and institutional woodworking. Available in 8 sizes, ranging from 24 to 96 inches in capacity. BESSEY. Simply better.