Jorgensen 7272 72 I-Bar Clamp These heavy-duty clamps are designed for high-demand professional and institutional use The steel I-bar is extremely strong and resistant to twisting and bending The sliding head is cast of tough ductile iron and features a 4-piece hardened steel clutch 6 feet maximum opening Made of extra carbon & manganese Multiple disc clutch grips automatically Secure and grip with easy release Fixed head design