Tool kit contains special tool for maintenance on vanagon diesel engine. 12mm socket nut for turbo charger, 19mm socket nut for central belt wheel bolt, 12mm XZN for cylinder head, 6mm Inbus, 5mm Inbus - long version- , 8 mm XZN for drive shaft, 27 mm socket nut for injectors and 17 mm Inbus for gear box oil screw. "advanced" kit contains 3 socket nut Inbus tools instead the hand tools. All socket nut for 1/2 zoll ratchet. Tools made from best quality stainless steel, made in Germany.