M8 x 1.0 - M10 x 1.0 - M10 x 1.25. Safely remove the end part of the glow plug electrode without damaging the cylinder head. Suitable for glow plugs threads: M8x1.0, M10x1.0, M10x1.25. WARNING: Many food and beverage cans have linings containing bisphenol A (BPA), a chemical known to the State of California to cause harm to the female reproductive system.