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.