Lang Tools 3472 3-Piece Fan Clutch Wrench Set Use to remove and replace thermostatic fan assemblies while eliminating the need for various size holding wrenches Includes the Universal Pulley Holder (3990), Small Pin Set (3901), 40mm Fan Clutch Wrench (3422) and 36mm Fan Clutch Wrench (3436) Use with 1/2" square drive tools and a torque wrench Applications include: Ford Trucks with 2.8L, 2.9L, 3.0L, 4.0L, 4.9L, and 5.0L engines, Dodge trucks with 3.9L, 5.2L, 5.9L, 8.0L V10 engines, GM trucks with 4.3L, 5.0L and 5.7L engines, and Jeeps with 5.2L engines Made in the USA