16PCS DAMAGED GLOW PLUG REMOVAL INSTALLATION KIT & THREAD REPAIR TOOL SET 16 Piece Tool Set for removal of Glow Plugs and repairing threads in cylinder head Simplifies the assembly, disassembly & professional repair of glow plug threads Suitable for most glow plugs Contains: Extractor unit to pull glow plugs Drills & guides Step drills to drill out damaged glow plugs 7mm x 5,5mm & 9mm x 5.5mm Taps M8 x 1.0, M10 x 1.0 & 1/4" x 28UNF Tap holder E10 socket 3/8" dr