The Lisle Corp. Diesel Filter Wrenches for Davco products, Nos. 61090, 61110 and 61130, are designed to remove and replace the main filter collar as well as the vent cap on aftermarket diesel fuel filter systems. The unique half-moon design provides easier access to the fuel filter, according to the company. High-strength steel prevents the wrench from flexing while loosening filter collars. Four teeth grab the vent cap securely to prevent damage and a thick, padded grip cushions users hands. The 61090 wrench fits 5" Davco 242/243 aftermarket fuel filter systems, the 61110 fits 6" Davco 382 aftermarket fuel filter systems and the 61130 fits 8" Davco 482 aftermarket fuel filter systems.