This special cam plate works for ALH TDI engines (used for 1999.5 Golf®/Jetta® 4 (or MKIV) and all New Beetle® TDI®) up to and including 2003 models. This tool permits you to lock your camshaft at top dead center WITHOUT removing your valve cover. Not for any other engine or purpose. For technicians who are experienced with TDI repairs and wish to increase the speed of the job. Milled from a SOLID piece of aluminum.