1X 43300 Pneumatic Fan Clutch Wrench Set. Step 4: Place the 3/8 driver deep hole socket at the end of the pneumatic extension. Step 3: Place the straight pneumatic extension on the wrench. Compatible with Ford GM Jeep Chrysler vehicles; 4.3L, 5.0L, or 5.7L GM pick up (van, mini-van, or SUV, but not for all).