Making metal table legs longer It is not difficult to make metal table legs longer. The most important thing is to first determine the desired length. Second, measure the metal tube or pipes that will be used for the table legs. Third, mark the appropriate length on the tubing. It is best to use a permanent marker so that the line is easily visible. Fourth, use a hacksaw to cut the tubing along the marked line. Fifth, use a file to smooth out the edges of the cut tubing. Sixth, use a drill to make a hole in the center of each tubing. The seventh, use a longer bolt to connect the two pieces of tubing. Eighth, use a washer and a nut to secure the bolt. Ninth, make sure that the table is level before use.