A range of robust clamps for heavy-duty applications with the option of fitting to a workbench. The extra heavy 'T' bar construction and large malleable SG iron clamping heads and stock are virtually unbreakable and make this clamp extremely durable. The high grade spring steel mainscrew incorporates an ACME thread for wear resistance. Available with capacity from 42" to 78" and bar length from 48" to 84". Bar measures 1.3/4" x 3/4". A lengthening bar is also available.