Lisle 61110 Diesel Filter Wrench 6" wrench with a unique half-moon design provide easier access to the fuel filter High strength steel prevents the wrench from flexing while loosening stubborn filter collars Four teeth grab the vent cap securely to prevent damage 6" wrench works on any diesel engines found in Caterpillar CT660, Ct11, CT13, CT15, Cummins, Detroit Diesel, International, Mercedes Bens, Paccar, Daimler Trucks North America, Kenworth, Mac, Navistar, Peterbilt, Thomas built Buses, Volvo Fits 6 inch Davco