Our range of heavy-duty clamps are manufactured from a high quality carbon steel bar with large malleable iron clamping heads. Other features include a high grade steel mainscrew with a wear resistant Acme thread, which applies pressure quickly and smoothly. Tail slides are easily adjusted and secured by a steel pin passing through one of the locating holes. Tail slide and heads are flat bottomed so that the clamp can stand upright without support. Available in Record or Eclipse brand. Available with capacity from 24" to 48" and bar length from 30" to 54". Bar measures 1.1/4" x 1/4". A 36" lengthening bar is also available.