This tool means that you can extract 10mm glow plugs that have been unscrewed, but cannot be removed due to restricted access between the glow plug & the cylinder head. Reamers are supplied for cleaning the glow plug apertures so that a new glow plug can be fitted easily. Packed in a blow moulded case. This tool means that you can extract 10mm glow plugs that have been unscrewed, but cannot be removed due to restricted access. between the glow plug & the cylinder head For removal of stubborn glow plugs. Reamers supplied for cleaning the glow plug apertures so that a new glow plug can be fitted easily. Suitable for 10mm glow plugs. Packed in a blow mould storage case.