The Matco Tools Pneumatic Fan Clutch Removal Set, No. PFCAH1, includes wrenches that allow for air hammers or ratchets and breaker bars to quickly and easily service water pumps and fan clutches. The new design enables the technician to reach and quickly remove stubborn parts with the square drive offset .401" shank air hammer extension arm that accesses from multiple angles. The set includes seven sizes to fit most applications in 32mm, 36mm, 40mm, 47mm, 7/8", 1-7/8", and 2".