Designed to meet the demanding needs of industrial workloads. The I-beam is very stiff - will not bend or twist 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 I-beam clamps are ideal for high-demand industrial and institutional woodworking. Available in 8 sizes, ranging from 24 to 96 in. in capacity.