Adjustable Plug Weld Tool, easier than ever to use your MIG, TIG or Oxy/Fuel welding equipment to fill a hole out in the middle of a panel or a spot weld on a panel edge. For metal panels only! This versatile tool features a strong magnetic mount and a adjustable 1-1/4" diameter copper swivel back-up head. Just attach to the back of the panel to be repaired and adjust the arm to back up holes up to an inch in diameter. Weld deposited metal will not stick to the paddle and the copper helps absorb heat to minimize warp age. Limited lifetime manufacturer's warranty offered.