Baum Tools 112250 E12 Cylinder Head Bolt Socket is used on M42, M43, M44, M50, M52, S52, M54, S54, M60, M62 and S62 engines. DO NOT USE WITH POWER TOOLS (to do so is dangerous and can damage the tool). El Paso Tools ships items promptly and with the fastest method possible. Our policy is to ship orders that total $100.00 and more with signature required.