Place the 5-foot length of the the tubing into the bench vise on the welding table. Keep it parallel to the ground.
Put on your welding goggles, gloves and apron. Heat the one end of the tubing. This prepares to for the welds that hold the fork and lugs.
Weld the 10-inch lengths of tubing onto the heated end of the main tube so they form a fork coming out from the end of the main tube.
Weld one 1-inch lug to the inside bottom of each branch of the welded fork on the bottom of the main tube. It should look like a two-pronged pitchfork with lugs on the inside of the prongs.
Wrap the top of the main tube with duct tape to use as a grip. Let the metal cool and the welds solidify for at least 30 minutes. Remove the tow bar from the vise.