●Application : Quickly removes & installs fan clutch when repairing the water pump or fan clutch, does the job much faster and easier than conventional fan clutch wrenches. no holding wrench is necessary. The set includes 8 driving wrenches that fit ford, gm and chrysler. driving wrench sizes include: 7/8, 30mm, 32mm, 36mm, 40mm ,47, 1-7/8 & 2. use with an air hammer