Description: High-quality Materials: The jaws of our bar clamps is made of cast iron, sturdy and not easy to deform. The slide bar is constructed from 45# carbon structural steel, ensuring long-lasting and crack-resistant performance. 36-inch Large Jaw Opening: Our bar clamps for woodworking are perfect for most standard-sized woods. The 36-inch length provides users with more adjustment space during operation, resulting in precise positioning of the workpiece.