Features FITMENT Allows access to fuel lines on 4-valve ISC 8.3 liter and ISB 5.9 liter engines when removing the fuel supply lines, also works on Detroit Diesel series 50 and Caterpillar engines (not for ISM engines). GREAT DESIGN Designed with a custom slim configuration and a 3/8" square drive to fit into the confined area surrounding the injection pumps. OUTSTANDING PERFORMANCE This unique 3/4" Fuel Injection Flare Nut Socket gives the technician the ability to access and remove fuel pump lines with little effort. USAGE .
