M10x1.5 BIG-SERT oversized head bolt thread repair used after a failed coil style repair. BMW 3& 5 series where the head bolt size is M10x1.5 and the threads start 6mm below the surface. Includes all the tools 14 inserts p/n 50155 and 2 head alignment dowels p/n 7588BS. If you are working on a first time repair use kit p/n 1090