For simple removal and replacement of glow plugs Designed to grip glow plug firmly Universal joint improves access to difficult and restricted areas Manufactured from high grade chrome vanadium steel 9 piece kit Includes 2 decarbonising drills and 1 puller Overall length: 150mm each Size: 8, 9, 10, 12, 14, 16 (mm) Drive type: 3/8 Sq. Dr.