OTC 4604 Frost Plug Installer Set - 4 Piece Designed to install frost plugs in liquid-cooled gas and diesel engines found in automobiles trucks SUVs agricultural equipment and construction equipment Simply use an air hammer with the driver and appropriate disc to install frost plugs ranging from 1 inch to 2-1/16 inch inch diameter Includes 4604-1 14 inch large driver 4604-2 3-piece frost plug disc set Lifting range 6 inch to 22 inch with a 47 inch reach