Features and Benefits:�39” x 39” metal welding table�Made from Q345 Steel�Brinell Hardness 140~160�Single Mounting Surface�Expandable�2 ton weight capacity�Industry Standard 28mm Mounting holes�100mm hole spacing�Etched Position MarksThe WJT-3939 welding jig table is perfect for thos small shops looking for a good economical fixture mounting system. It features one solid mounting surface that has a flatness of +/- .0025" and a Brinell hardness rating of between 140 and 160.