OTC 6005A Glow Plug Remover Tool Set 10 mm split nut will work on Ford 6.9L and 7.3L diesels GM 5.7L 6.2L and 6.5L diesels and various diesels in import vechicles 12 mm split nut works on various diesels in import vehicles plus many agricultural and construction diesel applications Includes 10 mm and 12 mm slip nuts three spacers 3/16 1/4 and 5/16 In Plastic storage case and instruction manual included