INJECTOR SEAT CUTTERS Quickly and easily removes carbon deposits from the injector seat, allowing for proper injector alignment. This set is suitable for most passenger cars manufactured after 2000. Kit: 15 mm cutter (flat), universal use 17 mm cutter (flat) BMW, PSA, RENAULT, FORD, CITROEN, PEUGEOT 19 mm cutter (flat), MERCEDES 21 mm cutter (angled)