The OTC 7894 is a Jeep/Dodge Ball Joint Service Adapter. The OTC 7894 used with ball joint service set Nos. 6530, 7248 and 7249 to remove or install aftermarket and original equipment upper and lower ball joints. The offset ball joints used to change caster/camber. It works on 1984–1989 downsized Jeep Wagoneer, Cherokee and Comanche, 1987–1998 Wrangler, 1993–2004 Grand Cherokee, 1994–2001 Dodge Ram 4WD 1/2-ton pickup.