Bar Clamps for Woodworking, 2-Pack 15.24 cm and 2-Pack 30.48 cm, Lockable F-Clamp with 272 kg Load Limit, 63.5 mm Depth, Cast Iron and Carbon Steel, Wood Clamps for Woodworking Metal WorkingProduct Features 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 proof performance Two Different Jaw Opening Sizes Our bar clamps for woodworking are ideal for various standard sized woods. The 12 inch length provides more adjustment space for precise positioning, and the 6 inch length can meet your