Applications: Used to clean & repair damaged spark plug bore threads in engine blocks, together with wheel bolt holes of BMW & MINI models (from 2013).Size: M14mm x 1.25mm spark plug threads x 3/8"D. Outside diameter: 17mm.Extra long shank (70.5mm) for cleaning deep-set plug sockets. Low, narrow profile for use in limited access areas.Manufactured from chrome vanadium with manganese phosphate coating for corrosion resistance.M14 thread cleaner (chaser) with integrated seal seat milling tool also available, please see Laser Part No. 8083.