This full closing, extra-heavy-duty Wilton® Brute Force "O" Series Bridge C-Clamp is perfect for use in heavy construction and fabrication projects as well as bridge and ship building. The full length spindle has a square head that withstands high torque and stands up to heavy wrench tightening. Extra-tough, drop-forged steel frame with adjustable opening. The black oxide coated spindle resists corrosion. Available in adjustable jaw widths from 1 7/16in. to 8 1/2in. Limited lifetime warranty.