Features and Benefits:Compact design and 3/8" square drive for easier access to Davco chassis mounted fuel filter assemblies.;61170 5" wrench works on any diesel engine with fuel flow rates up to 60 gph, Class 4, 5, & 6 trucks, pickup trucks, refrigeration units and some Biodiesel applications.;High strength laser-cut steel for durability.;ompact 5" Wrench Provides 100% Engagement on the Fuel Filter Collar.Compact design and 3/8" square drive for easier access to Davco chassis mounted fuel filter assemblies. High strength laser-cut steel for durability.Applications: The 5" wrench works on any diesel engine with fuel flow rates up to 60 gph, Class 4, 5, & 6 trucks, pickup trucks, refrigeration units and some Biodiesel applications.