Maglite D Cell Center Punch/Drill Tool Dorman Freeze Plug 555-104 / 555-104b 7075 Aircraft Aluminum (Far Superior to 6061 versions) 3/16" Center Hole Fits Dorman 555-104 and other Freeze Plugs - Updated 2 Step Tool, Fits New and Old Dorman 555-104 Sizes! Intended for Transfer Punch or Drilling with Drill Press